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Study Design

Workplace Panel Survey

Response

Responses in the 1-8th WPS

Responses in the 1-8th WPS
No. of
Successfully
-Surveyed
Workplaces
No. of
Original
Sample*¹
Response
rate of
Original
Sample*¹
(%)
No. of
Additional
Sample
Response
Rate of
Additional
Sample
(%)
Duration of Fieldwork
9th survey(WPS2021) 2,576 466 26.6 1,486 69.6 July 2022 ~ December 2022
8th survey(WPS2019) 2,795 516 29.5 1,637 76.6 July 2020 ~ January 2021
7th survey(WPS2017) 2,868 578 33.0 1,722 80.6 June 2018 ~ November 2018
6th survey(WPS2015) 3,431 681 38.9 2,136 100.0 July 2016 ~ March 2017
5th survey(WPS2013) 1,775 960 54.9 June 2014 ~ November 2014
4th survey(WPS2011) 1,770 1,091 62.4 July 2012 ~ November 2012
3rd survey(WPS2009) 1,737 1,229 70.3 July 2010 ~ January 2011
2nd survey(WPS2007) 1,735 1,415 80.9 June 2008 ~ November 2008
1st survey(WPS2005) 1,905 1,7492) 100.0 July 2006 ~ November 2006

*1 : The original sample refers to workplaces surveyed in the first year of the survey(WPS2005).
*2: The first year of the survey(WPS2005) included a special survey of the public sector, and 1,905 workplaces were surveyed, but 156 workplaces were not followed up after the first year of the survey, leaving the original sample of 1,749 businesses.

Panel response rate compared to last survey

Panel response rate compared to last survey
2005 2007 2009 2011 2013 2015 2017 2019 2021
No. of response workplaces 80.9 86.9 85.7 86.8 77.7 80.5 85.5 86.3
No. of response
workplaces both 2-waves
1,905(1,749)1) 1,735 1,737 1,770 1,775(1,666)2) 3,431 2,868 2,795 2,576
Response rate(%) 1,415 1,508 1,488 1,537 1,295 2,761 2,451 2,411

*1 : The first year of the survey(WPS2005) included a special survey of the public sector, and 1,905 workplaces were surveyed, but 156 workplaces were not followed up after the first year of the survey. Therefore, the survey success rate for the WPS2007 panel sample should be calculated for 1,749 workplaces.
*2 : From the sixth year of the survey(WPS2015), some industries (‘educational services’) were dropped from the sample, so the survey success rate for the WPS2015 panel sample has to be calculated for 1,666 workplaces.