稲作経営における収益性要因の比較分析 : メコン・デルタ, チャオプラヤ河流域とわが国(滋賀県)の農業経営調査結果より(<記念号>本岡武教授退官記念号)

Abstract

This study is related to my past work which has been reported in South East Asian Studies, Vol. 14, No. 3, December, 1976. In this article individual farm management data is used and a short-term managerial relationship between efficiency factors and capacity factors is assumed. By defining the production relationship in terms of four inputs, land, labor, capital, and dummy variables concerning the use of fertilizer or machinery, the coefficients for these factors in the models were estimated. The data employed were obtained in surveys conducted in Phong-dinh Province in the Mekong Delta and Ayutthaya in the Chao Phraya basin in 1973, and from official statistics of rice production costs in Shiga Prefecture for the same period. The main features of the cost structure and profitability of rice production for high-yielding varieties and local varieties are indicated in Table 2. Gross value and net revenue per hectare were divided into labor efficiency and labor-forces per hectare, the results of which are shown in Figures 4 and 5. Regression equations were fitted to the farm management data, and the coefficients derived for land differed significantly from zero in the models (Tables 3-5). The coefficients for capital in the regression equations for production costs were also significant. The major findings from these models are that output and production costs are each highly correlated to the size of operated land and that there exist significant differences in the elasticities estimated for the three regions.