On Making Micro Data Sets from Ad-hoc Surveys for Reliable Time-series Analysis of Household Financial Assets

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  • Kaneko Yuko
    Local Autonomy College, Ministry of Internal Affairs and Communications
  • Kainou Takeshi
    General Affairs Office, Postal Life Insurance Business Headquarters

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  • 世帯の金融資産の時系列分析を可能とする個票データの整備について
  • セタイ ノ キンユウ シサン ノ ジケイレツ ブンセキ オ カノウ ト スル コヒョウ データ ノ セイビ ニ ツイテ

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Abstract

The Survey on the Financial Asset Choice of Households (hereafter referred to Survey) collects information on household savings and liabilities. The first survey was conducted in 1988 and successive survey has been carried out every two years. We identified some problems in conducting various economic analyses such as time-series analysis by the use of survey results. In order to solve these problems and promote the use of the survey data, we carried out a research project in FY 2002. In the project, new data editing and tabulation rules were developed such as prioritizing actual figures rather than yes-or-no responses for the amounts of savings. By applying the new rules, the time-series trend of the amounts of savings per household was transformed into smooth one. The time-series trend of the amounts of liabilities per household became more stable by eliminating the outliners in the household distribution of liabilities by liability amount group. The main finding is that with proper size of micro data (about 6,000), we can have appropriate time-series trend from them by applying appropriate data editing and tabulation rules even if these data were collected by ad-hoc surveys.

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