本文?用考慮?質變?性的隨機生產邊界模型，同時估算1998-2004 期間稻作農家的生產風險與技術效?，並分析其影響因素。近??，臺灣的稻米生產是自有?動節?、耕作機械化、多用肥?、和租地化的型態。實證結果顯示：?動密集?、機耕工時比?、和租地比?的提高，可以增進技術效?。此外，?動和肥?是屬於風險遞減型的投入，而土地則是風險遞增型的投入；氣?的高低會影響生產風險，?雨?則?有顯著的影響。最後，根據迴歸結果得知：2001-2004 期間的稻農技術效?低於19982000 期間，而生產風險則是較高的。

The paper estimated the technical efficiency index of Taiwan rice farmers using panel data and a stochastic production frontier with heteroscedasticity during the period 1998-2004. The empirical results show that there were trends of own-labor-saving, mechanization of operations, fertilizer-using, and farm size expansion by lease. A higher level in labor intensity, the ratio of mechanical labor, or the ratio of rented land would yield a higher technical efficiency. Labor and fertilizer were risk-decreasing inputs while land was the risk-increasing input. Moreover, production risk was affected by temperature but not by precipitation. Finally, according to the regression results, the technical efficiency during 2001-2004 was lower than that during 1998-2000 while the production risk of the former was higher than the latter.