一、对我国农产品相对比较优势的评价　　当前对农产品比较优势测定采用较多的方法是美国斯坦福大学皮尔逊教授与其他学者合作创立的三种衡量比较优势的模式，即社会净收益（简称ＮＳＰ）、国内资源成本（简称ＤＲＣ）以及有效保护率（简称ＥＲＰ）。一般来说，以ＮＳＰ、ＤＲ First, the evaluation of the relative comparative advantage of China’s agricultural products At present, more methods for the determination of the comparative advantages of agricultural products are the three models of comparative advantage established by Professor Pearson and other scholars at Stanford University in the United States, namely, the social net income (NSP) , Domestic resource costs (referred to as DRC) and effective protection rate (referred to as ERP). In general, to NSP, DR