(3) |
Scope and Method of the Survey |
1. |
National Survey
This survey is conducted on approximately 33,000 establishments, selected from all private and public sector establishments normally employing 5 or more regular employees and belonging to Mining, Construction. Manufacturing, Electricity, Gas, Heat Supply and Water, Transport and Communication, Wholesale and Retail Trade, Eating and Drinking Places, Financing and Insurance, Real Estate and Services (Excluding domestic services in residence and without residence out of other services on life, and diplomatic official duties) according to the Standard Industrial Classification for Japan.
This survey is designed to keep the sampling errors for "contractual cash earnings" within a fixed magnitude by industry and by size of establishment.
About 16,700 Sample establishments with 30 or more regular employees are selected from the establishment list of Establishment Census by a stratified one stage sampling method. Samples are newly extracted at an interval of roughly every 3 years.
Meanwhile, sample establishments with 5-29 regular employees are selected by a stratified two stage sampling method. Firstly about 1,900 districts which are selected from the survey districts of Monthly Labour survey (about 50,000 districts) to be surveyed are selected, and secondly sample establishments are selected from the establishment lists made for the districts. Samples are renewed so that each of the selected establishment is surveyed for 18 months continuously and every 6 months one thirds of the samples are replaced. |
2. |
Prefectural Survey
This survey is conducted on approximately 43,500 establishments as same industry and size as in National Survey. |
3. |
Special Survey
This survey is conducted on all establishments on the following three points. |
|
(1) |
locate at the 4,750 sample districts selected from the survey districts of Monthly Labour Survey (about 96,000 districts) |
(2) |
belong to Mining, Construction, Manufacturing, Electricity, Gas, Heat Supply and Water, Transport and Communication, Wholesale and Retail Trade, Eating and Drinking Places, Financing and Insurance, Real Estate and Services (Excluding domestic services in residence and without residence out of other services on life, and diplomatic official duties) according to the Standard Industrial Classification for Japan |
(3) |
employ 1-4 regular employees as of the end of July every year (or as of the last day of the payroll period, in establishments with a fixed last day). |