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This chapter introduces a model that, instead of using the vintage model, assumes the existence of an important unobserved production factor. It suggests that technical inefficiency is observed in the estimation of the production function because this production factor cannot be explicitly accounted for. Based on this model, the chapter presents a method for testing whether the production factor is controlled or not. The test is conducted using data from Japanese manufacturing, and it demonstrates that the hypothesis of the existence of X-inefficiency cannot be rejected.

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X-inefficiencies in the Japanese Manufacturing Industries II: Identifying X-inefficiencies assuming the Existence of Inefficiency Unobserved Production Factors

  • 章节

  • 发表日期：

    2026年

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  • Akio Torii

摘要

This chapter introduces a model that, instead of using the vintage model, assumes the existence of an important unobserved production factor. It suggests that technical inefficiency is observed in the estimation of the production function because this production factor cannot be explicitly accounted for. Based on this model, the chapter presents a method for testing whether the production factor is controlled or not. The test is conducted using data from Japanese manufacturing, and it demonstrates that the hypothesis of the existence of X-inefficiency cannot be rejected.