DDI 3.0 and SOEP Goebel & Wackerow New Frontiers: Outline ...

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

What is SOEP?DescriptionData Structure

SOEP & DDI 3.0 Grouping ModelOverviewExample: SOEPData Relationships

DDI 3.0 and SOEP

Goebel & Wackerow

Outline

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

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

What is SOEP?

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

What is SOEP?

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

What is SOEP?

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

What is SOEP?

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

What is SOEP?

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

What do we measure?

when giving birth)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

What do we measure?

when giving birth)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

What do we measure?

when giving birth)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

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

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

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

Individual Level

Household Level

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Individual Level

Address Log

Household Level

$HBRUTTO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Individual Level

Address Log

Household Level

$HBRUTTO

$PBRUTTO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Individual Level

Individual QuestionnaireAddress Log

Address Log

Household Level

Household Questionnaire

$HBRUTTO

$PBRUTTO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Individual Level

Address Log

Household Level

Household QuestionnaireGenerated and Status Variables

Generated and Status Variables

$HBRUTTO

$PBRUTTO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Individual Level

Address Log

Household Level

$HBRUTTO

$PBRUTTO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Individual Level

Address Log

Household Level

$HBRUTTO

$PBRUTTO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

$PEQUIV

Individual Level

Address Log

Household Level

Household Questionnaire

$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

Overview

Example: SOEP

Data Relationships

Conclusion

SOEP: Principle Linkage Structure

Time (Years)

Wave T Wave U Wave V2003 2004 2005

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

persnrpersnr

Time (Years)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PersonalLevel

HouseholdLevel

persnrpersnr

Time (Years)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PersonalLevel

HouseholdLevel

uhhnrvhhnr

persnrpersnr

Time (Years)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PersonalLevel

HouseholdLevel

persnr

persnrPPFA

uhhnrvhhnr

persnrpersnr

Time (Years)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Outline

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

PhysicalInstance)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PhysicalInstance)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PhysicalInstance)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PhysicalInstance)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PhysicalInstance)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

− Concept− Data Collection− Logical Product

StudyUnit 1

StudyUnit X

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Subgroup 1

StudyUnit 1

StudyUnit X

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

StudyUnit 1

Subgroup 1

StudyUnit 1

StudyUnit X

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

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

Overview

Example: SOEP

Data Relationships

Conclusion

− Concept− Variable Definition− Question Text− Category Scheme− Code Scheme

Definition of:Group

Person Level

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

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

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Add Definition of:− Changing Variable Names

Wave N 1997(Satisfaction with life,

School Degree)

Study Unit

GroupPerson Level

DDI 3.0 and SOEP

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What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

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

Study Unit

GroupPerson Level

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

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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

Currency EURO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Definition of:− Concept− Variable Definition

Subgroup Subgroup

Currency DM

Person Level

Currency EURO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Add Definition of:− Question Text

Subgroup Subgroup

Currency DM

Person Level

Currency EURO

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

(household incomein DM and 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

Currency DM

Person Level

Currency EURO

Add Definition of:− Changing Variable Names

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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

Overview

Example: SOEP

Data Relationships

Conclusion

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

(1997–1998 and 1999–2003)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

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

(1997–1998 and 1999–2003)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

(1997–1998 and 1999–2003)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

(1997–1998 and 1999–2003)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

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Conclusion

Wave O 1998Study Unit

Company Size

Study UnitWave N 1997Company Size

Subgroup SubgroupTime Period 1997−1998:

Size of Company

Person LevelGroup

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

Overview

Example: SOEP

Data Relationships

Conclusion

Connected Data over Time(Wave Relationship)

PERSNR RP13501Satisfaction

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

Overview

Example: SOEP

Data Relationships

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PERSNR SP13501Satisfaction

unit (wave level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PERSNR TP14201Satisfaction

107646

unit (wave level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

107646

unit (wave level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

107646

unit (wave level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

107646

unit (wave level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Household-Person Relationship

PERSNR

Satisfaction

8107646

TP14201

122233

20032003

THHNRHH−IncomeHINC03

50003500

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

Overview

Example: SOEP

Data Relationships

Conclusion

PERSNR

Satisfaction

8107646

TP14201

122233

20032003

50003500

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

PERSNR

Satisfaction

8107646

TP14201

122233

20032003

50003500

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

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

Overview

Example: SOEP

Data Relationships

Conclusion

Person-Level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Person-Level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Person-Level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Person-Level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

Person-Level)

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

Overview

Example: SOEP

Data Relationships

Conclusion

XML-Example:

www.ddialliance.org/DDI/ddi3/SOEP DDI3.zip

J. Goebel: [email protected]

J. Wackerow: [email protected]

DDI 3.0 and SOEP

Goebel & Wackerow

What is SOEP?

Description

Data Structure

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: [email protected]

J. Wackerow: [email protected]

DDI 3.0 and SOEP Goebel & Wackerow New Frontiers: Outline ...

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