Efficiency Evaluation on Construction Industrial Circular Economy based on Improved DEA Model

Based on the characteristics of circular economy, the improved data envelopment analysis model is proposed with nonexpected inputs (waste utilization) and non-expected outputs (waste emissions). Then, the circular economic efficiency of China's construction industry from 2006 to 2010 is analyzed. The results show that the overall circular economic efficiency of China's construction industry is on the rise, and scale efficiency is slowly to achieve optimal, but the apparent inadequacy of pure technical efficiency affect the development of China's circular economic in construction industry.