Does mixed-mode data collection have influence to the quality of data of LFS?

The web pilot study of LFS in Statistics FinlandQ2014 Vienna 2‒5 June 2014

Kirsti PohjanpääHead of StatisticsStatistics Finland

Labor Force Survey in Finland

Telephone interview (CATI) The sample of 12,000 by month

A random sample of 15 to 74 year-olds FinnsQuestions about the whole household are presented in

the last (5th) interview There are five waves in 1,5 years The response rate is about 70‒75%

Q2014 Vienna A 2Kirsti Pohjanpää

The Web Pilot Study of LFS

One aim of the pilot is to find out if there is some mode effect between telephone interview (official LFS) and web data collection (the pilot data)

LFS normal data as a comparison data data collection at the same time different data collection mode (telephone – web)

Data collection at October 2013 There were some split plot tests in the pilot ESSnet Data Collection for Social Surveys using Multi Modes

Q2014 Vienna 3Kirsti Pohjanpää

The Web Pilot Study of LFS

Sample size n=8,000 A random sample of 15 to 74 year-olds Data collection at October 2013

Four fixed reference weeks The questionnaire is coded by Blaise IS

Only in Finnish Response rate 30%, data n=2,366 Respondents found the questionnaire quite good

Q2014 Vienna 4Kirsti Pohjanpää

Q2014 Vienna A 5Kirsti Pohjanpää

MON TUE WED THUR FRI WEEKEND

RW

MON TUE WED THUR FRI WEEKEND

week 1

DC starts: Adwanced Letter there

Text Message / Motivation Call

Motivation Calls…

MON TUE WED THUR FRI WEEKEND

week 2Mailing of Reminder

MON TUE WED THUR FRI WEEKEND

week 3Reminder

thereThe End of

Data Collection

Reference Week

Data collection total 18 days

Data Collection of One Reference Week

Q2014 Vienna A 6Kirsti Pohjanpää

Q2014 Vienna A 7Kirsti Pohjanpää

primary upper secondary tertiary university ALL education education education degree

Q2014 Vienna A 8Kirsti Pohjanpää

Employed Unemployed Active population Inactive population0

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

CATIWEB

The main indicators of LFS

Q2014 Vienna A 9Kirsti Pohjanpää

Unemployment rate

LFS

Q2014 Vienna A 10Kirsti Pohjanpää

“How many hours did you work in your main job during the week 7.10.-13.10.2013?”

___ hours ___ minutes

Number of Hours Worked, Group A

Q2014 Vienna A 11Kirsti Pohjanpää

“How many hours did you work in your main job during the week 7.10.-13.10.2013?”

Date Hours Minutes

Monday 7.10.2013 ___ ___

Tuesday 8.10.2013 ___ ___

Wednesday 9.10.2013 ___ ___

Thursday 10.10.2013 ___ ___

Friday 11.10.2013 ___ ___

Saturday 12.10.2103 ___ ___

Sunday 13.10.29013 ___ ___

Total ___ ___

Number of Hours Worked, Group B

Q2014 Vienna A 12Kirsti Pohjanpää

35

35.2

35.4

35.6

35.8

36

36.2

36.4

Ho

urs

wo

rke

d

One question (web)

Grid(web)

One question (telephone in-

terview)

Number of Hours Worked

Conclusions

The design, and testing of questionnaire is very important, and has power to the quality of data

The grid form of asking working hours recommended No (statistical significant) mode effects in main indicators More studies needed to confirm the best quality of LFS

data when mixing data collection modes Web and mixed mode data collection will be a normal part

of statistical process of LFS in future

Q2014 Vienna A 13Kirsti Pohjanpää