Nonparametric technical efficiency estimates of potentially polluting input use in soybean and wheat indicate substantial heterogeneity across farms. This implies large costs would be associated with uniform standards or incentives to regulate these inputs. While technical efficiency is not...

Whether the high economic growth of China is sustainable is the matter of interest to the public, government and academic circle of China and meanwhile it catches the attention of the world because the development of China has been exerting increasing impact on the world economy. Since the high...

Replaced with revised version of paper 08/06/10.