农民专业合作社规模经济和范围经济研究——基于山西省不同资产规模下的调研数据

采用广义超越对数成本函数模型及确定效应(Fix Period) SUR法,对山西省15个县市44家果蔬农民专业合作社的生产经营进行调研分析.为避免规模差异过大造成的异方差问题,以资产规模200万元为界,将样本合作社分成两组,分别计算其规模经济和范围经济.两组样本合作社总体上具有规模经济和范围经济,但特定产品规模经济(范围经济)各不相同,结论为:第一组样本合作社不能盲目扩大其规模,第二组相对具有竞争优势,各个多样化产出之间的联合生产能节约总成本.

Study on Economies Scale and Scope of Farmers' Specialized Co-operatives under Different Assets Size:Based on the Survey Data of Shanxi Province

The study uses fix period and SUR ways to estimate GLS model,analyzing economies of scale and scope of 44 co-ops by selected from 70 fruit and vegetable farmers’ specialized co-ops.2 million as a boundary,we divide 44 samples into two groups.Two groups of co-ops have general economies of scale and scope,but product-specific economies of scale(scope) is different.Conclusion is that the first group should expand its business scale,the second group has competitive relatively and joint production among outputs which could save total cost of co-ops.