損害保険の産業組織に関する実証的研究: 競争度及び費用効率性の推定と規制の評価

Translated title of the contribution: Competition, efficiency, and deregulation in the Japanese non-life insurance industory

姉崎 正起子*, 本間 哲志

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

In this paper, the degree of competition (Lerner index) and the cost efficiency of the Japanese non-life insurance (JNLI) industry are simultaneously estimated from the perspective of industrial organization, and the influence on the JNLI industry of the deregulation following the amendment of the Insurance Business Law (IBL) and the Japanese Financial Big Bang (JFBB) is evaluated. Under the market structureconduct-performance (SCP) paradigm, the Herfindahl index suggests that the degree of competition in the JNLI industry has decreased remarkably since 2001. However, assumptions about the market performance of the JNLI industry (degree of competition and cost efficiency) based on the SCP paradigm have incited criticism, as this model presumes market performance from market structure, and in most cases, direct estimation of market performance is not performed. Therefore, this paper aims to directly estimate market performance using the Lerner index and cost efficiency. The results of the present analysis suggest that the IBL revision and the JFBB stimulated the first stage of competition in the JNLI industry.
Translated title of the contributionCompetition, efficiency, and deregulation in the Japanese non-life insurance industory
Original languageJapanese
Pages (from-to)1-53
Number of pages53
JournalWorking Paper, Faculty of economics, university of toyama
Volume240
DOIs
StatePublished - 2009/08

Keywords

  • Japanese Non-Life Insurance Industry
  • Lerner Index
  • Cost Efficiency
  • Insurance Business Law
  • Japanese Financial Big Bang

ASJC Scopus subject areas

  • Economics, Econometrics and Finance (all)

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