Regional Efficiency Difference and the Choice of Moderate Scale of Live Pig Production of China
用DEA方法计算了2002-2010年中国散养、小、中、大规模生猪生产效率，发现效率提升主要靠投入规模扩张，不同区域和规模的最优养殖规模存在差异，各地应因地制宜选择适度规模。
Using DEA method,this paper has calculated the production efficiency of scatter-feed,small scale,middle scale and large scale in China between the periods of 2002 to 2010.The results show that:production efficiency enhance in China from 2002 to 2010 mainly rely on the expansion of the inputs scale,the contribution of technological efficiency take the second place.Production efficiency and the optimal breeding scale of different scales of live pig between different regions and provinces and cities exists difference.In the process of live pig's production development,various regions should adjust measures to local conditions to choose the moderate breeding scale.