Post on 28-May-2022
DDI 3.0 and SOEP
Goebel & Wackerow
OutlineNew Frontiers:
Can Panel Studies Go DDI?
First Experiences in Documenting the German Socio-Economic
Panel Study with DDI 3.0
Jan Goebel1 Joachim Wackerow2
1German SOEP Study, DIW Berlin
2GESIS-ZUMA
IASSIST, Montreal, 17. May 2007
DDI 3.0 and SOEP
Goebel & Wackerow
Outline
Outline
What is SOEP?DescriptionData Structure
SOEP & DDI 3.0 Grouping ModelOverviewExample: SOEPData Relationships
DDI 3.0 and SOEP
Goebel & Wackerow
Outline
Outline
What is SOEP?DescriptionData Structure
SOEP & DDI 3.0 Grouping ModelOverviewExample: SOEPData Relationships
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Outline
What is SOEP?DescriptionData Structure
SOEP & DDI 3.0 Grouping ModelOverviewExample: SOEPData Relationships
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What is SOEP?
I SOcio-Economic Panel StudyI Collect yearly representative microdata on the same
households and persons in the Federal Republic ofGermany since 1984 . . .
I . . . and since 1990 in East Germany.I Measuring Stability and Change in living conditions.
I In 2005, there were nearly 12,000 households, andmore than 21,000 persons sampled.
I Available for researchers in Germany and abroad
I More than 400 research groups currently using thedata
I All documentation as well as variable and valuelabels are available in German and English
I Part of the Cross-National Equivalent File (CNEF)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What is SOEP?
I SOcio-Economic Panel StudyI Collect yearly representative microdata on the same
households and persons in the Federal Republic ofGermany since 1984 . . .
I . . . and since 1990 in East Germany.I Measuring Stability and Change in living conditions.
I In 2005, there were nearly 12,000 households, andmore than 21,000 persons sampled.
I Available for researchers in Germany and abroad
I More than 400 research groups currently using thedata
I All documentation as well as variable and valuelabels are available in German and English
I Part of the Cross-National Equivalent File (CNEF)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What is SOEP?
I SOcio-Economic Panel StudyI Collect yearly representative microdata on the same
households and persons in the Federal Republic ofGermany since 1984 . . .
I . . . and since 1990 in East Germany.I Measuring Stability and Change in living conditions.
I In 2005, there were nearly 12,000 households, andmore than 21,000 persons sampled.
I Available for researchers in Germany and abroad
I More than 400 research groups currently using thedata
I All documentation as well as variable and valuelabels are available in German and English
I Part of the Cross-National Equivalent File (CNEF)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What is SOEP?
I SOcio-Economic Panel StudyI Collect yearly representative microdata on the same
households and persons in the Federal Republic ofGermany since 1984 . . .
I . . . and since 1990 in East Germany.I Measuring Stability and Change in living conditions.
I In 2005, there were nearly 12,000 households, andmore than 21,000 persons sampled.
I Available for researchers in Germany and abroad
I More than 400 research groups currently using thedata
I All documentation as well as variable and valuelabels are available in German and English
I Part of the Cross-National Equivalent File (CNEF)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What is SOEP?
I SOcio-Economic Panel StudyI Collect yearly representative microdata on the same
households and persons in the Federal Republic ofGermany since 1984 . . .
I . . . and since 1990 in East Germany.I Measuring Stability and Change in living conditions.
I In 2005, there were nearly 12,000 households, andmore than 21,000 persons sampled.
I Available for researchers in Germany and abroad
I More than 400 research groups currently using thedata
I All documentation as well as variable and valuelabels are available in German and English
I Part of the Cross-National Equivalent File (CNEF)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What is SOEP?
I SOcio-Economic Panel StudyI Collect yearly representative microdata on the same
households and persons in the Federal Republic ofGermany since 1984 . . .
I . . . and since 1990 in East Germany.I Measuring Stability and Change in living conditions.
I In 2005, there were nearly 12,000 households, andmore than 21,000 persons sampled.
I Available for researchers in Germany and abroad
I More than 400 research groups currently using thedata
I All documentation as well as variable and valuelabels are available in German and English
I Part of the Cross-National Equivalent File (CNEF)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What do we measure?
I SOEP data cover a wide range of subjects including:I Personality traitsI Occupational and family biographiesI Employment, participation and professional mobilityI EarningsI HealthI Personal satisfactionI Household composition, living situation
I Questionnaires:I Household (each year, head of household)I Personnel (each year, each person age 17 or older)I Biography (asked only once)I Triggered Questionnaires (e.g. “Mother & Child”,
when giving birth)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What do we measure?
I SOEP data cover a wide range of subjects including:I Personality traitsI Occupational and family biographiesI Employment, participation and professional mobilityI EarningsI HealthI Personal satisfactionI Household composition, living situation
I Questionnaires:I Household (each year, head of household)I Personnel (each year, each person age 17 or older)I Biography (asked only once)I Triggered Questionnaires (e.g. “Mother & Child”,
when giving birth)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What do we measure?
I SOEP data cover a wide range of subjects including:I Personality traitsI Occupational and family biographiesI Employment, participation and professional mobilityI EarningsI HealthI Personal satisfactionI Household composition, living situation
I Questionnaires:I Household (each year, head of household)I Personnel (each year, each person age 17 or older)I Biography (asked only once)I Triggered Questionnaires (e.g. “Mother & Child”,
when giving birth)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What do we measure?
I SOEP data cover a wide range of subjects including:I Personality traitsI Occupational and family biographiesI Employment, participation and professional mobilityI EarningsI HealthI Personal satisfactionI Household composition, living situation
I Questionnaires:I Household (each year, head of household)I Personnel (each year, each person age 17 or older)I Biography (asked only once)I Triggered Questionnaires (e.g. “Mother & Child”,
when giving birth)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Ideal Structure of a Panel Survey
“A data set containing observations on multiplephenomena observed over multiple time periodsis called panel data.” (Wikipedia: Panel Data)
I The same persons or households are interviewedeach year with the same instrument or questionnaire
I No change in documentation needed, except forupdating the year
I However, life is not that easy . . .
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Ideal Structure of a Panel Survey
“A data set containing observations on multiplephenomena observed over multiple time periodsis called panel data.” (Wikipedia: Panel Data)
I The same persons or households are interviewedeach year with the same instrument or questionnaire
I No change in documentation needed, except forupdating the year
I However, life is not that easy . . .
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Structure
I Most Data is on Person or Household Level(Dependence)
I Questionnaires and/or Variables are changing overtime
1. Improvement of instrument2. Changing real world3. Special Topics4. Changing Variable Names
I Principle Data Structure is Cross-Sectional⇒ New Datasets for each new wave (by year)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Structure
I Most Data is on Person or Household Level(Dependence)
I Questionnaires and/or Variables are changing overtime
1. Improvement of instrument2. Changing real world3. Special Topics4. Changing Variable Names
I Principle Data Structure is Cross-Sectional⇒ New Datasets for each new wave (by year)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Structure
I Most Data is on Person or Household Level(Dependence)
I Questionnaires and/or Variables are changing overtime
1. Improvement of instrument2. Changing real world3. Special Topics4. Changing Variable Names
I Principle Data Structure is Cross-Sectional⇒ New Datasets for each new wave (by year)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Structure
I Most Data is on Person or Household Level(Dependence)
I Questionnaires and/or Variables are changing overtime
1. Improvement of instrument2. Changing real world3. Special Topics4. Changing Variable Names
I Principle Data Structure is Cross-Sectional⇒ New Datasets for each new wave (by year)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Structure
I Most Data is on Person or Household Level(Dependence)
I Questionnaires and/or Variables are changing overtime
1. Improvement of instrument2. Changing real world3. Special Topics4. Changing Variable Names
I Principle Data Structure is Cross-Sectional⇒ New Datasets for each new wave (by year)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Structure
I Most Data is on Person or Household Level(Dependence)
I Questionnaires and/or Variables are changing overtime
1. Improvement of instrument2. Changing real world3. Special Topics4. Changing Variable Names
I Principle Data Structure is Cross-Sectional⇒ New Datasets for each new wave (by year)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Structure
I Most Data is on Person or Household Level(Dependence)
I Questionnaires and/or Variables are changing overtime
1. Improvement of instrument2. Changing real world3. Special Topics4. Changing Variable Names
I Principle Data Structure is Cross-Sectional⇒ New Datasets for each new wave (by year)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
Individual Level
Household Level
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
Individual Level
Address Log
Household Level
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
$HBRUTTO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
Individual Level
Address Log
Address Log
Household Level
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
$HBRUTTO
$PBRUTTO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
Individual Level
Individual QuestionnaireAddress Log
Address Log
Household Level
Household Questionnaire
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
$H
$P
$HBRUTTO
$PBRUTTO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
Individual Level
Individual QuestionnaireAddress Log
Address Log
Household Level
Household QuestionnaireGenerated and Status Variables
Generated and Status Variables
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
$HGEN
$PGEN
$H
$P
$HBRUTTO
$PBRUTTO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
Individual Level
Individual QuestionnaireAddress Log
Address Log
Household Level
Household QuestionnaireGenerated and Status Variables
Generated and Status Variables
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
$KIND
$HGEN
$PGEN
$H
$P
$HBRUTTO
$PBRUTTO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
Individual Level
Individual QuestionnaireAddress Log
Address Log
Household Level
Household QuestionnaireGenerated and Status Variables
Generated and Status Variables
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
$PKAL
$KIND
$HGEN
$PGEN
$H
$P
$HBRUTTO
$PBRUTTO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Data Structure
$PEQUIV
Individual Level
Individual QuestionnaireAddress Log
Address Log
Household Level
Household Questionnaire
GHOST
Generated and Status Variables
Generated and Status Variables
$: Wave specification: A, B, C, ... W for file names; where A=1984 ... W=2006 1: Waves G and H only; 2: Waves B through Q only; 3: Waves A through L only
Gross Information Generated InformationNet Information (Questionnaires)
$PKAL
$KIND
$HGEN
$PGEN
$H
$P
$HBRUTTO
The SOEP consists of265 datafiles and
after 22 Years!over 30,000 Variables
$PBRUTTO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Linkage Structure
Time (Years)
Wave T Wave U Wave V2003 2004 2005
TPUP
VP
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Linkage Structure
persnrpersnr
Time (Years)
Wave T Wave U Wave V2003 2004 2005
TPUP
VP
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Linkage Structure
PersonalLevel
HouseholdLevel
UHVH
TH
persnrpersnr
Time (Years)
Wave T Wave U Wave V2003 2004 2005
TPUP
VP
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Linkage Structure
PersonalLevel
HouseholdLevel
UHVH
TH
thhnr
uhhnrvhhnr
persnrpersnr
Time (Years)
Wave T Wave U Wave V2003 2004 2005
TPUP
VP
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
SOEP: Principle Linkage Structure
PersonalLevel
HouseholdLevel
persnr
persnr
persnrPPFA
D
UHVH
TH
HPF
AD
uhhnr
vhhnr
thhnr
thhnr
uhhnrvhhnr
persnrpersnr
Time (Years)
Wave T Wave U Wave V2003 2004 2005
TPUP
VP
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Outline
What is SOEP?DescriptionData Structure
SOEP & DDI 3.0 Grouping ModelOverviewExample: SOEPData Relationships
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What this Example is about!
I Description of the logical structure and possibilitiesto document a complex panel survey, like SOEP
I We do not focus on Physical representation of dataand frequencies
I We skip thinks likeI data format, column position, and width of variables
(module PhysicalDataProduct), as well asI Frequencies and descriptive statistics (module
PhysicalInstance)
I Each variable in those modules points by referenceto the overall definition of the variable in the moduleLogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What this Example is about!
I Description of the logical structure and possibilitiesto document a complex panel survey, like SOEP
I We do not focus on Physical representation of dataand frequencies
I We skip thinks likeI data format, column position, and width of variables
(module PhysicalDataProduct), as well asI Frequencies and descriptive statistics (module
PhysicalInstance)
I Each variable in those modules points by referenceto the overall definition of the variable in the moduleLogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What this Example is about!
I Description of the logical structure and possibilitiesto document a complex panel survey, like SOEP
I We do not focus on Physical representation of dataand frequencies
I We skip thinks likeI data format, column position, and width of variables
(module PhysicalDataProduct), as well asI Frequencies and descriptive statistics (module
PhysicalInstance)
I Each variable in those modules points by referenceto the overall definition of the variable in the moduleLogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What this Example is about!
I Description of the logical structure and possibilitiesto document a complex panel survey, like SOEP
I We do not focus on Physical representation of dataand frequencies
I We skip thinks likeI data format, column position, and width of variables
(module PhysicalDataProduct), as well asI Frequencies and descriptive statistics (module
PhysicalInstance)
I Each variable in those modules points by referenceto the overall definition of the variable in the moduleLogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What this Example is about!
I Description of the logical structure and possibilitiesto document a complex panel survey, like SOEP
I We do not focus on Physical representation of dataand frequencies
I We skip thinks likeI data format, column position, and width of variables
(module PhysicalDataProduct), as well asI Frequencies and descriptive statistics (module
PhysicalInstance)
I Each variable in those modules points by referenceto the overall definition of the variable in the moduleLogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
What this Example is about!
I Description of the logical structure and possibilitiesto document a complex panel survey, like SOEP
I We do not focus on Physical representation of dataand frequencies
I We skip thinks likeI data format, column position, and width of variables
(module PhysicalDataProduct), as well asI Frequencies and descriptive statistics (module
PhysicalInstance)
I Each variable in those modules points by referenceto the overall definition of the variable in the moduleLogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
The Idea of Grouping and Inheritance
I Hierarchical Model
I On the top level:definition of Informationas a standard
I On a lower level:capture of variationsand additions
I Inheritance of allcharacteristics ofstudies down thehierarchy tree ofmeta-data!
Group− Concept− Data Collection− Logical Product
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
The Idea of Grouping and Inheritance
I Hierarchical Model
I On the top level:definition of Informationas a standard
I On a lower level:capture of variationsand additions
I Inheritance of allcharacteristics ofstudies down thehierarchy tree ofmeta-data!
− Concept− Data Collection− Logical Product
StudyUnit 1
− Concept− Data Collection− Logical Product
StudyUnit X
Group− Concept− Data Collection− Logical Product
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
The Idea of Grouping and Inheritance
I Hierarchical Model
I On the top level:definition of Informationas a standard
I On a lower level:capture of variationsand additions
I Inheritance of allcharacteristics ofstudies down thehierarchy tree ofmeta-data!
− Concept− Data Collection− Logical Product
Subgroup 1
− Concept− Data Collection− Logical Product
Subgroup 1
− Concept− Data Collection− Logical Product
StudyUnit 1
− Concept− Data Collection− Logical Product
StudyUnit X
Group− Concept− Data Collection− Logical Product
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
The Idea of Grouping and Inheritance
I Hierarchical Model
I On the top level:definition of Informationas a standard
I On a lower level:capture of variationsand additions
I Inheritance of allcharacteristics ofstudies down thehierarchy tree ofmeta-data!
− Concept− Data Collection− Logical Product
StudyUnit 1
− Concept− Data Collection− Logical Product
StudyUnit 1
− Concept− Data Collection− Logical Product
Subgroup 1
− Concept− Data Collection− Logical Product
Subgroup 1
− Concept− Data Collection− Logical Product
StudyUnit 1
− Concept− Data Collection− Logical Product
StudyUnit X
Group− Concept− Data Collection− Logical Product
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easiest Task
I A variable like the PERSNR (never changing personID) is consistently defined with constant values overthe whole period and for all datasets (currently in169)
I Definition only necessary at the top-level(ConceptScheme, LogicalProduct)
I However most variables do change, at least thevariable name (within SOEP)!
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easiest Task
I A variable like the PERSNR (never changing personID) is consistently defined with constant values overthe whole period and for all datasets (currently in169)
I Definition only necessary at the top-level(ConceptScheme, LogicalProduct)
I However most variables do change, at least thevariable name (within SOEP)!
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easiest Task
I A variable like the PERSNR (never changing personID) is consistently defined with constant values overthe whole period and for all datasets (currently in169)
I Definition only necessary at the top-level(ConceptScheme, LogicalProduct)
I However most variables do change, at least thevariable name (within SOEP)!
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easy Task
I Variables like School Degree or Life Satisfaction areconsistently defined with constant values over thewhole period, but with different names over time
I Basic Definition at the top-level (ConceptScheme,LogicalProduct, which include VariableScheme,CodeScheme, as well as CategoryScheme)
I At the lower level (StudyUnit), for each year the the“variable name part” of the variable definition will beadded
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easy Task
I Variables like School Degree or Life Satisfaction areconsistently defined with constant values over thewhole period, but with different names over time
I Basic Definition at the top-level (ConceptScheme,LogicalProduct, which include VariableScheme,CodeScheme, as well as CategoryScheme)
I At the lower level (StudyUnit), for each year the the“variable name part” of the variable definition will beadded
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easy Task
I Variables like School Degree or Life Satisfaction areconsistently defined with constant values over thewhole period, but with different names over time
I Basic Definition at the top-level (ConceptScheme,LogicalProduct, which include VariableScheme,CodeScheme, as well as CategoryScheme)
I At the lower level (StudyUnit), for each year the the“variable name part” of the variable definition will beadded
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easy Task
GroupPerson Level
waves 1997−2003information for all
⇒ Corresponding Variables over Time can be identified bythe definition in the VariableScheme in the overall group.
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easy Task
− Concept− Variable Definition− Question Text− Category Scheme− Code Scheme
Definition of:Group
Person Level
waves 1997−2003information for all
⇒ Corresponding Variables over Time can be identified bythe definition in the VariableScheme in the overall group.
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easy Task
Wave N 1997(Satisfaction with life,
School Degree)
Study UnitWave O 1998
(Satisfaction with life,School Degree)
Study Unit
− Concept− Variable Definition− Question Text− Category Scheme− Code Scheme
Definition of:Group
Person Level
waves 1997−2003information for all
⇒ Corresponding Variables over Time can be identified bythe definition in the VariableScheme in the overall group.
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easy Task
Add Definition of:− Changing Variable Names
Wave N 1997(Satisfaction with life,
School Degree)
Study UnitWave O 1998
(Satisfaction with life,School Degree)
Study Unit
GroupPerson Level
waves 1997−2003information for all
⇒ Corresponding Variables over Time can be identified bythe definition in the VariableScheme in the overall group.
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The easy Task
Wave T 2003(Satisfaction with life,
School Degree)
Study Unit
Wave S 2002(Satisfaction with life,
School Degree)
Study Unit
Wave R 2001(Satisfaction with life,
School Degree)
Study Unit
Wave Q 2000(Satisfaction with life,
School Degree)
Study Unit
Wave P 1999(Satisfaction with life,
School Degree)
Study UnitWave N 1997
(Satisfaction with life,School Degree)
Study UnitWave O 1998
(Satisfaction with life,School Degree)
Study Unit
GroupPerson Level
waves 1997−2003information for all
⇒ Corresponding Variables over Time can be identified bythe definition in the VariableScheme in the overall group.
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The realistic task
I Questionnaires and/or Variables are changing overtime (not only the names)
I Improvement of instrument with change in wording,categories . . .
I Changing real world with new or obsolete variablesI Special Topics in only some years
I Solution: Introduce Subgroups
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The realistic task
I Questionnaires and/or Variables are changing overtime (not only the names)
I Improvement of instrument with change in wording,categories . . .
I Changing real world with new or obsolete variablesI Special Topics in only some years
I Solution: Introduce Subgroups
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: The realistic task
I Questionnaires and/or Variables are changing overtime (not only the names)
I Improvement of instrument with change in wording,categories . . .
I Changing real world with new or obsolete variablesI Special Topics in only some years
I Solution: Introduce Subgroups
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping Model: Example I
I Because of the European Monetary Union (1.1.2002)the currency of income changes from DM to e
I Insert two Subgroups (before and after)
Subgroup Subgroup
Time Period 1997−2001:
Currency DM
Person Level
Group
waves 1997−2003information for all
Time Period 2002−2003:
Currency EURO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping Model: Example I
I Because of the European Monetary Union (1.1.2002)the currency of income changes from DM to e
I Insert two Subgroups (before and after)
Definition of:− Concept− Variable Definition
Subgroup Subgroup
Time Period 1997−2001:
Currency DM
Person Level
Group
waves 1997−2003information for all
Time Period 2002−2003:
Currency EURO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping Model: Example I
I Because of the European Monetary Union (1.1.2002)the currency of income changes from DM to e
I Insert two Subgroups (before and after)
Add Definition of:− Question Text
Subgroup Subgroup
Time Period 1997−2001:
Currency DM
Person Level
Group
waves 1997−2003information for all
Time Period 2002−2003:
Currency EURO
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping Model: Example I
I Because of the European Monetary Union (1.1.2002)the currency of income changes from DM to e
I Insert two Subgroups (before and after)
(household incomein DM and EURO)
(household incomein DM and EURO)
(household incomein DM and EURO)
(household incomein DM and EURO)
(household incomein DM and EURO)
(household incomeonly in EURO)
(household incomeonly in EURO)
Wave N 1997Study Unit
Wave O 1998Study Unit
Wave P 1999Study Unit
Wave Q 2000Study Unit
Wave R 2001Study Unit
Wave S 2002Study Unit
Wave T 2003Study Unit
Subgroup Subgroup
Time Period 1997−2001:
Currency DM
Person Level
Group
waves 1997−2003information for all
Time Period 2002−2003:
Currency EURO
Add Definition of:− Changing Variable Names
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: Example II
Company Size Change in surveyed categoriesTwo different CodeSchemes(1997–1999 and 1999–2003)
Concerns about the e Only asked around the currencyunion (1999-2003)
⇒ Introduction of only two Subgroups
(1997–1998 and 1999–2003)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: Example II
Company Size Change in surveyed categoriesTwo different CodeSchemes(1997–1999 and 1999–2003)
1997–1998 1999–2003
Value Category Label Value Category Label
1 LT 5 1 LT 52 GE 5 and LT 20 2 GE 5 and LT 203 GE 20 and LT 200 3 GE 20 and LT 1004 GE 200 and LT 2000 4 GE 100 and LT 2005 GE 2000 5 GE 200 and LT 20006 NA, Self-Employed 6 GE 2000
7 Self-Employed
Concerns about the e Only asked around the currencyunion (1999-2003)
⇒ Introduction of only two Subgroups
(1997–1998 and 1999–2003)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: Example II
Company Size Change in surveyed categoriesTwo different CodeSchemes(1997–1999 and 1999–2003)
1997–1998 1999–2003
Value Category Label Value Category Label
1 LT 5 1 LT 52 GE 5 and LT 20 2 GE 5 and LT 203 GE 20 and LT 200 3 GE 20 and LT 1004 GE 200 and LT 2000 4 GE 100 and LT 2005 GE 2000 5 GE 200 and LT 20006 NA, Self-Employed 6 GE 2000
7 Self-Employed
Concerns about the e Only asked around the currencyunion (1999-2003)
⇒ Introduction of only two Subgroups
(1997–1998 and 1999–2003)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: Example II
Company Size Change in surveyed categoriesTwo different CodeSchemes(1997–1999 and 1999–2003)
Concerns about the e Only asked around the currencyunion (1999-2003)
⇒ Introduction of only two Subgroups
(1997–1998 and 1999–2003)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: Example II
Company Size Change in surveyed categoriesTwo different CodeSchemes(1997–1999 and 1999–2003)
Concerns about the e Only asked around the currencyunion (1999-2003)
⇒ Introduction of only two Subgroups
(1997–1998 and 1999–2003)
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 Grouping: Example II
Wave O 1998Study Unit
Company Size
Study UnitWave N 1997Company Size
Subgroup SubgroupTime Period 1997−1998:
Size of Company
Person LevelGroup
waves 1997−2003information for all
Time Period 1999−2003:Size of Company and
Concerns about EURO
Study UnitWave P 1999Company Size
Study UnitWave R 2001
Company Size
Study UnitWave T 2003Company Size
Study UnitWave S 2002Company Size
Study UnitWave Q 2000Company Size
Concerns Euro Concerns Euro Concerns Euro
Concerns EuroConcerns Euro
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Connected Data over Time(Wave Relationship)
PERSNR RP13501Satisfaction
123
56
4
n
4
62
8110
x
2001
I Top Group: Formal panel groupI Description of Wave relationship and case identifierI Inheritance down the hierarchical tree to each study
unit (wave level)
I The central case ID (here PERSNR) is described inthe section DataRelationship of the LogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Connected Data over Time(Wave Relationship)
123
57
4
n
3
67
569
x
PERSNR SP13501Satisfaction
2002
PERSNR RP13501Satisfaction
123
56
4
n
4
62
8110
x
2001
I Top Group: Formal panel groupI Description of Wave relationship and case identifierI Inheritance down the hierarchical tree to each study
unit (wave level)
I The central case ID (here PERSNR) is described inthe section DataRelationship of the LogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Connected Data over Time(Wave Relationship)
1
n x
PERSNR TP14201Satisfaction
7 8
3
56
4
107646
2003
123
57
4
n
3
67
569
x
PERSNR SP13501Satisfaction
2002
PERSNR RP13501Satisfaction
123
56
4
n
4
62
8110
x
2001
I Top Group: Formal panel groupI Description of Wave relationship and case identifierI Inheritance down the hierarchical tree to each study
unit (wave level)
I The central case ID (here PERSNR) is described inthe section DataRelationship of the LogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Connected Data over Time(Wave Relationship)
1
n x
PERSNR TP14201Satisfaction
7 8
3
56
4
107646
2003
123
57
4
n
3
67
569
x
PERSNR SP13501Satisfaction
2002
PERSNR RP13501Satisfaction
123
56
4
n
4
62
8110
x
2001
I Top Group: Formal panel groupI Description of Wave relationship and case identifierI Inheritance down the hierarchical tree to each study
unit (wave level)
I The central case ID (here PERSNR) is described inthe section DataRelationship of the LogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Connected Data over Time(Wave Relationship)
1
n x
PERSNR TP14201Satisfaction
7 8
3
56
4
107646
2003
123
57
4
n
3
67
569
x
PERSNR SP13501Satisfaction
2002
PERSNR RP13501Satisfaction
123
56
4
n
4
62
8110
x
2001
I Top Group: Formal panel groupI Description of Wave relationship and case identifierI Inheritance down the hierarchical tree to each study
unit (wave level)
I The central case ID (here PERSNR) is described inthe section DataRelationship of the LogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Connected Data over Time(Wave Relationship)
1
n x
PERSNR TP14201Satisfaction
7 8
3
56
4
107646
2003
123
57
4
n
3
67
569
x
PERSNR SP13501Satisfaction
2002
PERSNR RP13501Satisfaction
123
56
4
n
4
62
8110
x
2001
I Top Group: Formal panel groupI Description of Wave relationship and case identifierI Inheritance down the hierarchical tree to each study
unit (wave level)
I The central case ID (here PERSNR) is described inthe section DataRelationship of the LogicalProduct
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Household-Person Relationship
1
n
PERSNR
7
3
56
4
THHNR
x
Satisfaction
8107646
TP14201
122233
m
20032003
THHNRHH−IncomeHINC03
123
ym
50003500
800
I Top Group: Description of Household-Person(hierarchical) relationship
I Section DataRelationship
I Changing household ID on wave/study unit level
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Household-Person Relationship
1
n
PERSNR
7
3
56
4
THHNR
x
Satisfaction
8107646
TP14201
122233
m
20032003
THHNRHH−IncomeHINC03
123
ym
50003500
800
I Top Group: Description of Household-Person(hierarchical) relationship
I Section DataRelationship
I Changing household ID on wave/study unit level
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Household-Person Relationship
1
n
PERSNR
7
3
56
4
THHNR
x
Satisfaction
8107646
TP14201
122233
m
20032003
THHNRHH−IncomeHINC03
123
ym
50003500
800
I Top Group: Description of Household-Person(hierarchical) relationship
I Section DataRelationship
I Changing household ID on wave/study unit level
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Conclusion
I Current possibilities:I Documentation of changes in meta data over time
(Panel Surveys)I Description of connected data over time, as well asI between hierarchical data (i.e. Household- and
Person-Level)
I LimitsI XML Structure getting very complex, need for tools
to create and maintain the XML File(s)I Existing documentation must may be reconsidered,
adapted or/and supplemented to fit into the newDDI structur, i.e. Concepts.
I However, still some open questions:I Integration in existent workflow?I Technical reorganization? XML-Database?
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Conclusion
I Current possibilities:I Documentation of changes in meta data over time
(Panel Surveys)I Description of connected data over time, as well asI between hierarchical data (i.e. Household- and
Person-Level)
I LimitsI XML Structure getting very complex, need for tools
to create and maintain the XML File(s)I Existing documentation must may be reconsidered,
adapted or/and supplemented to fit into the newDDI structur, i.e. Concepts.
I However, still some open questions:I Integration in existent workflow?I Technical reorganization? XML-Database?
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Conclusion
I Current possibilities:I Documentation of changes in meta data over time
(Panel Surveys)I Description of connected data over time, as well asI between hierarchical data (i.e. Household- and
Person-Level)
I LimitsI XML Structure getting very complex, need for tools
to create and maintain the XML File(s)I Existing documentation must may be reconsidered,
adapted or/and supplemented to fit into the newDDI structur, i.e. Concepts.
I However, still some open questions:I Integration in existent workflow?I Technical reorganization? XML-Database?
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Conclusion
I Current possibilities:I Documentation of changes in meta data over time
(Panel Surveys)I Description of connected data over time, as well asI between hierarchical data (i.e. Household- and
Person-Level)
I LimitsI XML Structure getting very complex, need for tools
to create and maintain the XML File(s)I Existing documentation must may be reconsidered,
adapted or/and supplemented to fit into the newDDI structur, i.e. Concepts.
I However, still some open questions:I Integration in existent workflow?I Technical reorganization? XML-Database?
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Conclusion
I Current possibilities:I Documentation of changes in meta data over time
(Panel Surveys)I Description of connected data over time, as well asI between hierarchical data (i.e. Household- and
Person-Level)
I LimitsI XML Structure getting very complex, need for tools
to create and maintain the XML File(s)I Existing documentation must may be reconsidered,
adapted or/and supplemented to fit into the newDDI structur, i.e. Concepts.
I However, still some open questions:I Integration in existent workflow?I Technical reorganization? XML-Database?
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Conclusion
I Current possibilities:I Documentation of changes in meta data over time
(Panel Surveys)I Description of connected data over time, as well asI between hierarchical data (i.e. Household- and
Person-Level)
I LimitsI XML Structure getting very complex, need for tools
to create and maintain the XML File(s)I Existing documentation must may be reconsidered,
adapted or/and supplemented to fit into the newDDI structur, i.e. Concepts.
I However, still some open questions:I Integration in existent workflow?I Technical reorganization? XML-Database?
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
XML-Example:
www.ddialliance.org/DDI/ddi3/SOEP DDI3.zip
J. Goebel: jgoebel@diw.de
J. Wackerow: wackerow@zuma-mannheim.de
DDI 3.0 and SOEP
Goebel & Wackerow
What is SOEP?
Description
Data Structure
SOEP & DDI 3.0Grouping Model
Overview
Example: SOEP
Data Relationships
Conclusion
Thank you for your attention!Enjoy the DDI soup!
(SOEP in Dutch = soup)
XML-Example:
www.ddialliance.org/DDI/ddi3/SOEP DDI3.zip
J. Goebel: jgoebel@diw.de
J. Wackerow: wackerow@zuma-mannheim.de