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Home > Statistics > Outline of Statistics and Statistical Release Schedule > Notices of Changes and Corrections 2017 > Addition of Sample Enterprises of the Tankan
February 20, 2017
Research and Statistics Department
Bank of Japan
The Bank of Japan has decided to add 36 non-financial enterprises to its Tankan (Short-Term Economic Survey of Enterprises in Japan) sample from the March 2017 survey (see Appendix).
To prevent a decrease in the number of sample enterprises -- due to bankruptcies, mergers, and other factors -- from causing a decline in the statistical accuracy of the Tankan, the Bank examines the statistical accuracy once a year and adds new sample enterprises if necessary.1 Following this examination carried out using sample enterprises of the most recent December 2016 survey, the Bank has decided this time to add the aforementioned sample enterprises. As a result, the number of samples of non-financial enterprises and financial institutions for the March 2017 survey will total 10,799 and 196, respectively.
Details are described below.
Population enterprises of the Tankan are subdivided into 391 strata for population estimation based on three classifications -- industry, capital size, and number of employees. For each stratum, we examined whether the distribution of sample enterprises properly reflects that of population enterprises based on the capital size and number of employees.
We found that the distribution of sample enterprises deviated from that of population enterprises for one stratum, as well as that the distribution of sample enterprises of some strata is likely to deviate in the future due to a possible decrease in the number of sample enterprises.2 Therefore, the Bank has made modifications -- by adding sample enterprises -- to the sampling distribution of these strata.
As a result of these modifications made to the sampling distribution, the standard error ratios3 of total sales are within the target range for the six main categories by industry and scale -- with manufacturing registering less than 3 percent and nonmanufacturing 5 percent -- as shown in the chart below.
|Large Enterprises||Medium-Sized Enterprises||Small Enterprises|
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|Total||Large Enterprises||Medium-Sized Enterprises||Small Enterprises|
|Lumber & Wood products||-||-||-||-|
|Pulp & Paper||-||-||-||-|
|Petroleum & Coal products||-||-||-||-|
|Ceramics, Stone & Clay||5||-||-||5|
|Iron & Steel||-||-||-||-|
|Food & Beverages||-||-||-||-|
|Business oriented machinery||-||-||-||-|
|Shipbuilding, Heavy machinery & Other transportation machinery||-||-||-||-|
|Goods rental & Leasing||-||-||-||-|
|Transport & Postal activities||-||-||-||-|
|Other information communication||-||-||-||-|
|Electric & Gas utilities||-||-||-||-|
|Services for businesses||6||-||6||-|
|Services for individuals||-||-||-||-|
|Accommodations, Eating & Drinking services||-||-||-||-|
|Mining & Quarrying of stone and gravel||-||-||-||-|
|Shinkin banks & Other financial institutions for small businesses||-|
|Financial products transaction dealers||-|
|Non-deposit money corporations||-|