The Effect of Incentive Reforms Upon Productivity: Evidence from the Vietnamese Rice Industry
利用越南省级面板数据，研究1975年后两次激励改革（1981年允许农民保留部分收成、1987年改善土地产权）对水稻全要素生产率的影响，发现年均增长3.3%-3.5%，第一次改革后增长最快。
In this study we use region-level panel data on rice production in Vietnam to investigate total factor productivity (TFP) growth in the period since reunification in 1975. Two significant reforms were introduced during this period, one in 1981 allowing farmers to keep part of their produce, and another in 1987 providing improved land tenure. We measure TFP growth using two modified forms of the standard Malmquist data envelopment analysis (DEA) method, which we have named the Three-year-window (TYW) and the Full Cumulative (FC) methods. We have developed these methods to deal with degrees of freedom limitations. Our empirical results indicate strong average TFP growth of between 3.3 and 3.5 per cent per annum, with the fastest growth observed in the period following the first reform. Our results support the assertion that incentive related issues have played a large role in the decline and subsequent resurgence of Vietnamese agriculture.