Based on the importance of wheat production in the country, the main objective of this paper is to analyze the relationships between inputs and economic efficiency in the production of wheat using cost dual approach. So, after estimating the cost of flexible functions, translog cost function was used to estimate function coefficients, returns to scale and elasticity of substitution. This function was estimated along with the seemingly unrelated regression equations share of the cost to duplicate, in the crop year 2013-2014. Allen partial cross elasticity for each pair of inputs showed that inputs of fertilizer is replaced by machines and labors and seed has complementary relationship with labor, fertilizer and machinery. The results indicated that there is relationship between replacement of machinery and labor. Calculation the price elasticity of demand indicates that seed has more elasticity and fertilizer is without elasticity in wheat production process. Besides, these results suggest that economies efficiency derived from scale is less than 1. In other words, the production of wheat in Shahin Dezh District has decreasing returns relative to the scale.
کلید واژگان :cost function, elasticity of substitution, returns to scale, seemingly unrelated regression, wheat
ارزش ریالی : 300000 ریال
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