Abstract: This paper conducts a quantitative measurement of the loss of profit efficiency of China’s export enterprises by using the heteroscedastic stochastic frontier model and analyzes the factors affecting profit efficiency by using standardized regression and rolling regression methods. The results show that the overall profit rate of China’s export enterprises is lower than the optimal level by about 50% -60%, and this loss of efficiency has no significant changes due to the difference of importers. The ownership nature of state-owned enterprises has become the main factor leading to the loss of profit efficiency. To increase the added value of export products and to improve the corporate recognition can play an important role in reducing the loss of profit efficiency.

Key words: profit efficiency; heterogeneity; stochastic frontier model; asymmetric information; ownership nature