ارزیابی ماهیت و روند تغییر تکنولوژی در صنعت گاوداری ایران

Background: the use of modern technology in production units is one of the main factors of improving input productivity in livestock sub-sector. objectives: so the main objective of this research is analyzing the trend and technical change biases in iran’s livestock using cost duality theory. metods: the approach given in the duality theory is found useful in estimating the structure of input demand under changing input prices and technology conditions. applying sure method, a translog cost function with cost share equations estimated using panel data from 24 provinces of iran for the period 1980-2000. results: the results showed that the rate of technical change was about -0.312 percent during the studied period, which means that the rate of cost changes of production units, has been decreased. in addition, technical change in livestock industry was feed-using, labor-saving and energy-saving biases. counclosions: the finding does indicate, increasing original cows and using artificial insemination as symbols of technical change, causes decrease in production cost and improve profitability of milk production.