从软预算约束的角度对地方政府的土地财政行为进行分析,使用我国1999～2009年的面板数据,运用数据包络分析方法对城市全要素生产率的增长进行了实证研究。结果表明,全国29个省市的TFP都呈现出上涨的趋势,几乎所有的全要素生产率的增长都归功于技术进步,每个省或多或少都存在产出效率低下问题,并用一阶差分GMM估计方法验证了建成区面积对我国经济增长有着显著的溢出效应。 From the perspective of soft budget constraint, this paper analyzes the land-based fiscal behavior of local governments and uses the panel data from 1999 to 2009 in our country to make an empirical study on the growth of urban total factor productivity using data envelopment analysis. The results show that the TFPs of 29 provinces and cities all over the country have shown an upward trend. Almost all the TFP growth is attributed to technological progress. Each province has more or less the problem of inefficient output, and the first-order difference GMM estimation method verifies that the built-up area has a significant spillover effect on the economic growth in our country.