| This paper applies Environmental RAM model to measure green development efficiency, sources of inefficiency and emission reduction method of 112 key environmental protection cities in China over the period 2005 to 2010. We then apply bootstrap truncated regression model to empirically examine the relationship between urbanization and green development efficiency. The major conclusions are as follows: The green development efficiency in China’s different regions basically shows an inverted U-shaped and cubic form trajectory and has a very different performance. The green development efficiency of eastern regions is higher than that in central regions and that in central regions higher than the western regions. The gap of green development efficiency between eastern regions and central regions is gradually narrowing, but the gap between western regions and others has the expanded tendency. Some urban agglomerations’ green development efficiency in central regions or western regions are higher than that in eastern regions and the urban agglomeration of China has not really played out the economic effect.The excess of pollutant emission is the main source of total inefficiency, followed by the overuse of energy, labor and capital. Most cities mainly choose natural reduction when facing the pressure of economic development, energy conservation and emissions reduction. Population urbanization has a significant role in promoting the green development efficiency, while land urbanization plays a negative impact. Employment urbanization, economic urbanization and comprehensive urbanization have a negative impact before they are promoting the green development efficiency. |