【摘要】 通过黑龙江和吉林两省107个县2002-2011年的面板数据,运用双重差分模型,以国家粮食安全为因变量,本文定量评价财政水土保持投资的福利效率。研究结果表明,水土保持工程建设对国家粮食安全有正面影响,对样本期间粮食总产量的贡献高达26.52%,且该影响持续至少一年;但分析结果也表明,如果不能保证水土保持工程的持续性,则可能会产生负增产效应。因此,以保障国家粮食安全为目标,应保持和增加财政水土保持工程建设投资。更多还原

【Abstract】 Using a large panel dataset containing 107 countries of Heilongjiang Province and Jilin Province from 2002 to 2011,we evaluate economic efficiency of soil and water conservation projects on the prospective of national food safety with a difference-in-differences estimation method. The result shows that the investment contributes to more than 26. 52% of total grain production in the sample period and such positive effect has lasted more than one year. However,the analysis also shows that if we can not guarantee the continuity of soil and water conservation projects,it may produce a negative yield. Therefore,in order to ensure national food security,we should maintain and increase financial investment in soil and water conservation construction.更多还原