Technical Inefficiency and Public Capital in U.S. States: A Stochastic Frontier Approach
使用随机前沿生产函数分析1970-1983年美国48个州的数据，发现公共资本与私人资本之比越高，技术无效率越严重，但高速公路公共资本占比越高则无效率越低。
This paper estimates a translog stochastic frontier production function in the analysis of all 48 contiguous U.S. states in the period 1970–1983, to attempt to measure and explain changes in technical efficiency. The model allows technical inefficiency to vary over time, and inefficiency effects to be a function of a set of explanatory variables in which the level and composition of public capital plays an important role. Results indicate that U.S. state inefficiency levels are significantly and positively correlated with the ratio of public capital to private capital. The proportion of public capital devoted to highways is negatively correlated with technical inefficiency, suggesting that not only the level but also the composition of public capital influences state efficiency.