MEASURING FARM EFFICIENCY OVER TIME ON PHILIPPINE RICE FARMS
利用随机前沿生产函数，测量菲律宾吕宋岛中部水稻农场在1970、1974、1979和1982年的技术效率，发现技术无效率是偏离前沿的主要原因，且效率总体提升，尤其在1979至1982年间。
This paper measures farm‐specific technical efficiencies of rice farms in Central Luzon, the Philippines, at discrete points in time. Stochastic frontier production functions are estimated from the International Rice Research Institute's Loop Survey for the years 1970, 1974, 1979 and 1982. From the results, a measure of relative technical efficiency is calculated for each farm for each year. The four distributions of technical efficiencies are examined. Results show that technical inefficiency is the major reason for deviation from the frontier production function. All four samples show a large range of inefficiency but in general efficiency has improved, particularly between 1979 and 1982.