Hitotsubashi-RIETI International Workshop

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Hitotsubashi-RIETI International Workshop Comments on “Inefficiency in Rice Production and Land Use: A Panel Study of Japanese Rice Farmers” by Professor Ogawa Hitotsubashi-RIETI International Workshop on Real Estate Market, Productivity, and Prices October 13-14, 2016 Hiroshi Ohashi Economics, U Tokyo

Summarizing the paper A good contribution to the literature, where little quantitative work has been done on agricultural sector in Japan. The purpose of the paper is to (1) estimate the efficiency of rice production in Japan, and (2) identify the differences between efficient and inefficient rice farmers. The paper identifies the increasing returns to scale of 1.02. Inefficient farmers are found to be inflexible in utilizing inputs. Efficient farmers tend to produce non-rice crops if they have many smaller plots of land. Data from 2008 to 2013 on Rice Production Cost Statistics with 5453 observations over 47 prefectures.

Average Costs by land size (per 60 kg of rice production) 5,000 10,000 15,000 20,000 25,000 30,000 2 4 6 8 10 12 (Yen) less than 0.5ha 0.5 ~ 1ha 1 2ha 3ha 3 5ha 5 7ha 7 10ha 15ha ( ha ) Average income per 60kg of rice production Land size average (excl Hokkaido and Okinawa) Data source: Production size: Census of Agriculture and Forestry 2010 Income and cost: Cost of Production of Rice, Wheat and Barley, 2009 Census 2000: Rice Production Total Cultivated area (thou. hectares) Number of rural communities Number of rice crop farmers Number of farmers with income from rice sales Avg. number of rice farmers in a community Averages for Rice Farming Cultivated area (ares) In-house labor hrs. (person, day) Agricultural machinery cost (\ ten thousand) 42 prefectures 1,449.4 116,859 1,912,925 1,648,311 16.4 75.8 206.4 395.3

Frequency on Sizes Data: Census of Agriculture and Forestry 2010 20 40 60 50 100 150 200 2,500 5,000 7,500 10,000 12,500 15,000 Data: Census of Agriculture and Forestry 2010 Data: Census of Agriculture and Forestry 2010 Number of Rice Farmers (10 thousands) Number of Rice Farmers (10 thousands) Rice-cultivated area (ares) [by 5ares segments] Daily yield of rice-farm labor per person (yen) [by 500yen segments]

Comments on Estimation Production function; factor demand function; dynamic factor demand function; and land-utilization function are independently estimated. However, they are closely linked, and the estimation can be handled in a unified way. Selection bias (exits of farmers; or changes in plot size for a particular farmer) Inputs endogeneity

Other Comments What lead to the paper’s conclusion on the differences between efficient and inefficient farmers? Anticipation on the opportunity to convert farm land to other uses (Saito and Ohashi, 2011) Subsidies on farmers producing feed (not food) rice Eliminating production subsidies on substituting from rice to beans or wheat. Etc Welfare analysis is perhaps also possible with external estimates on demand elasticity of food rice (e.g., -3.45 from Arahata, 2010) The paper opens up many interesting policy questions to ask on the effectiveness of agricultural policies.