Productivity Analysis of Logging Industry in Japan

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  • ARAI Koji
    Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
  • TACHIBANA Satoshi
    Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan

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  • 我が国林業の素材生産における生産性分析
  • ワガクニ リンギョウ ノ ソザイ セイサン ニ オケル セイサンセイ ブンセキ

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Abstract

Improving the productivity of forestry is a long-term issue in Japan. Labor productivity is a common measure when considering productivity of Japanese forestry, while more comprehensive indices are desired for multifactor productivity. The purposes of this paper are to grasp the productivity changes and their regional differences in the Japanese logging industry. We analyzed Total Factor Productivity (TFP) separately for final cutting and thinning using survey data from 1990 to 2017 provided by the Japanese Forestry Agency. The Törnkvist TFP index was used to analyze the nation-wide average TFP change, and the Multilateral TFP index with circularity was used to measure regional TFP changes. The results show that the TFP of final cutting grew at 1.35％ per year over the period of 1990-2017. The TFP of thinning declined at 1.07％ per year over the period of 2006-2017. Regional analyses revealed that Hokkaido, Tohoku, and Kyushu regions had higher TFP levels in 2017 for both final cutting and thinning. We also estimated Cobb-Douglas production functions to analyze the economies of scale for the years 2016 and 2017 as a factor which changes TFP in the Japanese logging industry. The results showed that final cutting and thinning had constant returns to scale.

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