利用PCA-DEA模型对中国2004—2012年30个省市区的生态效率进行综合测评.结果表明:1)2种模型得出中国总体生态效率综合平均值分别为0.760和0.581,相对效率较低;自2011年以来有显著提升,且规模效率逐渐向技术效率转变;2)省际生态效率差异明显,但有缩小的趋势;3)东部地区的生态效率最高,但内部差异也最大,整体上东中西部地区内部差异有扩大趋势;4)省区"投入-产出"模式的划分,有助于因地制宜采取不同的政策导向,逐步提高区域社会经济发展的生态效率.
In order to evaluate eco-efficiency of every province in China from 2004 to 2012, PCA-DEA model was applied. We found that the average of Chinese relative eco-efficiency was low and had no significant change mainly due to technical inefficiency, but the scale efficiency had shifted to technical efficiency since 2011. Although the eco-efficiency disparities between different provinces were obvious, the disparities had decreasing tendency. In contrast, regional disparity of eco-efficiency in the east region tends to expand. Accordingly, policy incentives are suggested to improve the regional eco-efficiency.
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