Research on the Rational Scale of Construction Enterprise Based on DEA

Rational scale influences the development and the benefits of construction industry largely. Collecting 29 listed outstanding achievement construction enterprises, the paper sets up a DEA (data envelopment analysis) model to analysis their rationality. The result shows that the scales of the most collected enterprises are irrational, the large-scale constructions are big but not strong, cannot get the intensive economies of scale, and the mid-small-scale professional enterprises get high-level scale economical profit by invests saving and expenditure reducing. The profits of more than half of the enterprises are decreasing return to scale. Only a few enterprises realize the increasing return to scale.