Utilizing the Internet as a Viable Data Collection Method

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KNSO 2006. 11. 7.

Utilizing the Internet as a Utilizing the Internet as a Viable Data Collection MethodViable Data Collection Method

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Applying the Internet for a statistical surveys

중·단기통계연구기본방향

1) Application of the e-survey method to the CMMS

2) Introduction of an electronic housekeeping book

3) Introduction of the e-Population Census

< Contents >

BackgroundII

IIII

Cost-benefit analysis of the Internet surveyⅢⅢ

Limits and prospects ⅣⅣ


I. Background

Increase in difficulties of field surveys.

Growing single and dual income families(2005)

Burden in the matters of time and privacy

Inefficiency caused by traffic jam

Interviewer can only visit 3~4 households per day.

Why NSO adopt a new data collection method ?

Others(50%)

Dual income(35.8%)

Single(17%)


I. Background

Great developments made in IT.

Increase in diffusion rate of PC(85%, 2005)

Expansion of internet users

Source: National Internet Development Agent of Korea (http://www.nida.or.kr)

Why NSO adopt a new data collection method ?

73.571.968.264.158.051.6Internet

Usage(%)

200620052004200320022001Year

We apply electronic survey methods as a new solution.


II. Applying the Internet to Surveys

What are the main surveys using internet method?

To provide data for analyzing the trends ofe-commerce

To understand the characteristics of population & housing

To provide data on income & expenditures

To provide data for economic trend

Purpose

About 15%(700)

0.9%(140,000)

24.8%(1,639)

50.4%(3,862)

Rate of Internetsurvey

MonthlyEvery 5 yearsMonthlyMonthlyPeriodicity

About 4,500 enterprises AllAbout 7,100

householdsAbout 8,000 establishmentsSample size

Cyber Shopping Mall survey

PopulationCensus

Household Income & Expenditure Survey

Current Mining & Manufacturing Survey


Basic concept

E-survey process

Ⅰ. Install special software in the computer of a respondent

Ⅱ. Educate respondents on how to use the program

Ⅲ. Respondents fill out the electronic questionnaire using the

S/W

Ⅳ. Save the questionnaire file and transfer it to NSO

Application of the e-survey method to the CMMS


PCmodem

NSOserver

Compilingdata

Transferringdata

< establishment > < NSO > < NSO >

1 In the case of PC communication


Difficulties encountered in the early stage.

Some opposition from local offices due to possibility of a reduction in staff

Hard to install S/W and teach each respondent how to use it

Some technological errors have occurred

Danger derived from hacking and weakness in information protection

In the first stage, the participation rate was very low

(below 10%)


In the case of PC communication1



Basic concept

Process of the Internet survey for CMMSⅠ. Type the web address in Internet search engine

(http://mi.nso.go.kr:7777)

Ⅱ. Log in with respondent’s ID and password

Ⅲ. Fill out the electronic questionnaire

Ⅳ. Transfer the data to the NSO


In the case of the Internet method2

PCInternet

NSOserver

Compilingdata

Transferringdata< establishment > < NSO > < NSO >



II. Applying the Internet to surveys

Strength of the Internet method.

No installation of S/W required

Easy to upgrade S/W to updated version

Provides various useful functions such as a help function, explanation of survey terms and search function for production items

Increase in participation of the Internet survey

53.7%47.1%46.6%37%

2006. 9.200520042003Year

Source : internal data of NSO





PasswordID

Login





itemquantity Sum of

moneyproduction

shipment

A reference column

addressnameID

Save




Basic concept

Survey processDownload S/W from the website(http://e-diary.nso.go.kr)Log in with ID and passwordFill out electronic questionnaireTransfer data to NSO


Collecting information

HousekeepingBook DB Statistical DB

Storing in DB

< respondent >

bank credit card

Introduction of an electronic housekeeping book



Special functions

Collecting income and expenditure data from banks and credit card companies

Checks data omissions in monthly bills or living expenses

Visualizing Graphs according to items

The participation ratio of e-survey

Sauce : internal data of NSO

1,7671,639825341# Of household

24.8%23.0%11.6%4.8%Ratio

2006. 9.2006. 6.2006. 3.2006. 1.Year



Expected effects

1) Raise the timeliness of statistical dataSaving about 10 days in data editing process

2) Improvement in the accuracy of dataCollecting and error checking function

3) Increase in responses from single and dual income households The degree of statistics representative also gets higher

4) Decrease in work load of the surveyorWorkers can focus on other projects





Electronic House

keeping book

download




date item income expenditure




Basic concept

linkage

PC

Internet

Transferringdata

NSO DB

Survey processⅠ. Take applications from households that want to use the e-censusⅡ. Down load S/W from the web site and login with IDⅢ. Fill out e-questionnaireⅣ. Transfer data to NSO

Introduction of the e-Population Census

address DB

housing DB


Result and effects

Ⅰ. Applied to only o.9%(140,000) of all households

But, it provides valuable experience for

the next Census

Ⅱ. Effective in encouraging the participation of

groups such as single and dual households


Introduction of the e-Population Census


Focused on direct-cost and direct-benefit

Direct cost primarily includes cost of developing S/W

Direct benefit primarily includes expected reduction in cost of labor

Excludes all indirect cost and benefits

A very simplified model.

Ⅲ. Cost-benefit analysis of Internet survey

Fundamental assumption



Table(million Won)

Analysis

Benefit is more than 15 times of the cost

Current Mining & Manufacturing Survey.1

- Cost : 50 million won per year.

- Benefit : average 7,600 million won per year.B/C ratio : 1,520%

1,520%0.57.6CMMS

B/C RatioCostBenefit



Household Income and Expenditure Survey.2

Table(million Won)

Analysis

We may extrapolate the e-HIES as an inefficient method

- Cost : 1,600 million won per year.

- Benefit : 950 million won per yearB/C ratio : only 59%

59%16.19.5HIES



The reason why B/C ratio is low

1) Issue a compensation of 50,000won per household for respondents who complete the e-survey

If more households participate, more direct-cost will be needed

2) Indirect benefits were excluded

Increase in the recollection rate of housekeeping recordsReduction in the possibility of exposing privacyRelieving the burden of respondents

If these conveniences were included, the B/C ratio would increase to a higher percentage.


Household income and Expenditure Survey.2



E-population Census.3

Table(million Won)

Analysis

Even though the participation rate was lower than expected, the B/C ratio shows the efficiency of the e-Census.

- Cost : 200 million won

- Benefit : 460 million won B/C ratio : 230%

230%24.6Population

Census



Impossible to apply in an area deprived of the Internet.

about 25% of the total population in Korea(especially in rural areas and elderly)

Only volunteers people can be targeted

Well-structured system is needed to prevent privacy leakage against hacking

E-survey is a simple supplemental method to the traditional paper survey

Ⅳ. Limits and prospect

What are the limits of Internet survey


Cuts down the cost of the statistical survey

Reduces the processing time of data

CMMS : 1.5days of processing timeHIES : 10days

Increases the accuracy of data

An editing program assures a high quality of data

Ⅳ. Limits and prospect

Prospect

E-survey through the internet will expand rapidly.

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Utilizing the Internet as a Viable Data Collection MethodUtilizing the Internet as a Viable Data Collection Method

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