Using data from Chinese A-share listed companies from 2010 to 2021, we examined the impact of ESG rating disagreement on stock price synchronicity and its mechanisms. We discovered that ESG rating disagreement increases stock price synchronicity by raising investors' information costs and reducing the efficiency of ESG information incorporation into prices. This effect is more pronounced when average ESG ratings are either low or high. Our findings highlight how ESG rating disagreement affects stock price synchronicity and provide insights for regulators to standardize rating criteria and foster a conducive ESG investment environment, promoting pricing efficiency in the capital markets.

The controlling shareholder of a firm may suffer as a result of its right to control the firm due to unfavorable market reactions associated with concerns on private benefit extraction by the controlling shareholder. Thus, the controlling shareholder has an incentive to build a good governance mechanism as a commitment device in order to discipline itself, which allows it to sell shares at a higher price in the initial public offering (IPO). An improvement in pricing efficiency will give the controlling shareholder more incentive to limit its private benefits from controlling the firm. Therefore, we propose that, besides improving the efficiency of capital allocation, the development of the financial market can shape the corporate governance of firms in an economy, thus improving firm operation efficiency. A model of IPO is constructed to demonstrate this mechanism of market discipline. Using data from China stock market on the regulatory changes in IPO pricing and firm ownership structure, we find evidence consistent with the model’s implications.

The paper estimates the primary market pricing efficiency of China’s IPO after the IPO reform in June 2009, based on the stochastic frontier analysis. The results show that IPO pricing is not fully effective, and discover the existence of “deliberate underpricing”. The average pricing efficiency of China's IPO has reached 0.85, which is close to the level of the mature capital market; To certain extent, we can say that the reform of China's IPO has achieved the initial success. We also found that earnings per share and price earnings ratio are the greatest influencing factors. And there is no underwriter reputation in China. For different markets, we disclosed that, IPO pricing efficiency values in Growth Enterprise Market and Small and Medium Enterprise Board are substantially higher than the Main Board market. The paper analyzes the causes, and then gives some suggestions for the reform of China's IPO.