This paper utilizes the non-linear estimation method to simulate the Zipf distribution, and constructs an alternative measure of Hirschman–Herfindahl index (HHI), in order to reveal the real changes in monopoly of China's industrial markets. Based on the annual waves of the Chinese Industrial...

In the past two decades, China has experienced a series of regulatory reforms in its electricity industry, aimed at improving power production efficiency. The central planning system was broken up and the market-oriented modern enterprise system was established. Furthermore, the former...

When the selected parametric model for the covariance structure is far from the true one, the corresponding covariance estimator could have considerable bias. To balance the variability and bias of the covariance estimator, we employ a nonparametric method. In addition, as different mean...