Japan Household Panel Survey(JHPS/KHPS)
Japan Household Panel Survey(JHPS/KHPS)
- -KHPS Data(2004－) Former “Keio Household Panel Survey” (KHPS)
- -JHPS Data(2009－) Former “Japan Household Panel Survey” (JHPS)
Panel surveys are becoming essential for today's social science research and policy evaluation, since they facilitate analyses of dynamic behavior by economic entities and analyses considering heterogeneity that cannot be observed by continuously following the same individuals. However, in Japan there is no household panel survey that did not focus on a specific class but rather reflected the population composition of society as a whole, such as the Panel Study of Income Dynamics (PSID) in the U.S. and the European Community Household Panel (ECHP) in Europe. To respond to such demands, the Keio Household Panel Survey (KHPS) has been implemented continuously since 2004 on 4,000 households and 7,000 individuals nationwide. An additional survey on a cohort of about 1,400 households and 2,500 individuals was initiated from 2007. (In order to compensate for sample dropout, approximately 1,400 and 1,000 new survey subjects were recruited in 2007 and 2012, respectively.) Covering a wide range of analysis topics such as employment behavior, poverty trends, and status of inter-household transfer of real assets the survey is regarded as a pioneering data collection tool, unparalleled in Japan in terms of quality and quantity.
Utilizing our performance record in implementing the KHPS, in 2009, the Panel Data Research Center at Keio University began implementing the “Japan Household Panel Survey” (JHPS) a new survey targeting 4,000 male and female subjects nationwide in parallel with the KHPS. In addition to economic status and employment status, the JHPS collects data focused on education and health/ healthcare. Furthermore, when the first JHPS was conducted, experimental tests were carried out in order to examine the relationship between the survey methods and survey response rates. These tests not only contributed to the efficient implementation of this survey, but also produced important results in terms of the background to the decrease in survey response rates, which has become a problem for many social surveys in recent years.
Because there are questions common to both the JHPS and KHPS, the survey questionnaires cover comprehensive topics such as household structure, individual attributes, academic background, employment/education status, distribution of living hours, matters related to cohabitation with parents, etc.
KHPS and JHPS survey subjects are selected by means of two-stage stratified random sampling. In the first stage of sampling, the entire country is stratified into 24 levels according to regional and city classifications, and the number of samples for each level are distributed in accordance with basic resident register population ratios. The number of areas to be surveyed within each level is determined, with around 10 samples for each survey area (around 5 samples each for KHPS 2007 and KHPS 2012), and random sampling of the designated number of survey areas is carried out. For survey areas, national census survey districts are used as sampling units. In the second stage of sampling, basic resident registers for the selected survey areas are utilized as sampling registers, and approx. 10 people (5 each for KHPS 2007 and KHPS 2012) for each survey area are selected from amongst appropriate candidates as survey subjects based on designated numbers and sampling intervals. However, when it is not possible to meet and/or survey an officially selected survey subject because they have moved residence, they are absent for an extended period, or their address is unknown, a pre-selected reserve survey subject will be surveyed instead, thereby maintaining the planned sample size (KHPS 2004 = 4,000; KHPS 2007 = 1,400; KHPS 2012 = 1,000). Reserve survey subjects are randomly selected from candidate subjects who live in the same survey district, are the same gender (male/female), and are in the same age group (20s, 30s, 40s, 50s, 60 years or above) as the official survey subject to be replaced. Accordingly, regardless of whether the person responding to the survey is an official survey subject or a reserve survey subject, no bias occurs in the sampling ratios in terms of gender and age categories.
In the case that survey subjects are married, their spouses are asked the same survey questions.
|KHPS wave||KHPS Questionnaires||JHPS wave||JHPS Questionnaires|
|6th wave||KHPS2009||1st wave||JHPS2009|
|7th wave||KHPS2010||2nd wave||JHPS2010|
|8th wave||KHPS2011||3rd wave||JHPS2011|
|9th wave||KHPS2012||4th wave||JHPS2012|
|10th wave||KHPS2013||5th wave||JHPS2013|
|11th wave||KHPS2014||6th wave||JHPS2014|
|12th wave||KHPS2015||7th wave||JHPS2015|
|13th wave||KHPS2016||8th wave||JHPS2016|
|14th wave||KHPS2017||9th wave||JHPS2017|
|15th wave||KHPS2018||10th wave||JHPS2018|