This study investigates the effect of the carbon emission trading scheme on a firm’s total factor productivity in China. With a sample from 2008 to 2019, applying the time-varying DID method, our empirical results reveal that the carbon emission trading scheme significantly improves a firm’s total factor productivity, which provides evidence for Porter’s hypothesis. Moreover, there are two channels through which the total factor productivity is impacted: the corporate green innovation channel and the resource allocation efficiency channel. Furthermore, the impact of the carbon emission trading scheme is more pronounced for private firms, and firms in the provinces with higher institutional development, lower environmental quality, and greater law enforcement of environmental protection tend to have larger total factor productivity. Our models survive numerous robustness checks.

This paper investigate the impact of leverage structure on stock price synchronicity. To better understand the mechanism of the impact of leverage, we break leverage into operating leverage and financing leverage. This breakdown reveals the impact of different component of leverage. Moreover, in this paper, we employ the quantile regression model to investigate the impact of leverage on different level of stock price synchronicity, which provides us a more comprehensive picture. Our empirical results show, operating and financing leverage have negative impact on stock price synchronicity. Moreover, the higher the stock price synchronicity becomes, the higher this impact is. Furthermore, the marginal effect of financing leverage will be attenuated as the profitability of firms becomes higher, but the interaction effect doesn’t exist for operating leverage. On the contrary, the marginal effect of financing leverage will be enhanced as the market capitalization of firms becomes larger, again, it doesn’t exist for operating leverage. Finally, as firms are state-owned, the marginal effect of both operating and financing leverage will be higher.