We use the event study method to assess the impact of China's National Centralized Drug Procurement (NCDP) policy on the stock price of A-share listed companies in pharmaceutical industry. And the empirical evidence reveals that the policy has a negative effect on the share prices of firms won the bids in the past six centralized procurement. The stock prices of winning bidders were more negatively affected than those of non-winning bidders. If the winning bid price continues to be depressed, we cannot rule out the possibility of a collective abandonment of bidding by quality manufacturers.

We investigate a prevalent yet overlooked form of corporate social responsibility (CSR) activities, i.e., government-launched CSR. Contrary to the conventional view that mandatory CSR destroys firm value, we document a positive market reaction to governmentlaunched CSR activities that aim to alleviate poverty. Analyses of operating performance and firm value confirm the positive impact. Further analyses suggest that while governmentlaunched CSR intervenes the operation of the firm by reducing the operating efficiency, firms enjoy higher operating margin, take more market share and save selling expense and labor cost by engaging their operations with the poverty-stricken areas. Participating firms are also rewarded more government subsidy. We further find that government-launched CSR activities achieve the stated objective of poverty relief. However, it also crowds out the firms' investment in other CSR activities. Overall, the evidence indicates that government-launched CSR has economy-wide implications than the traditional CSR.

Lin, Cai, and Li (1998) argue that under information asymmetry, SOE managers can use state-imposed policy burdens as excuses of poor performance and make the State accountable for it. The argument implies that turnover-performance sensitivity of SOEs decreases as policy burdens increase and that such impact depends on the extent of information asymmetry. Accordingly, this paper empirically explores how policy burdens affect top management turnover of Chinese listed firms between 2000 and 2005. We find that high surplus labor significantly reduces the sensitivity of chairman turnover to performance for state-controlled firms, while private firms do not exhibit such a pattern. Furthermore, our results show that high surplus labor reduces the turnover-performance sensitivity more for firms with greater information asymmetry. Overall, we find strong evidence supporting the implications of Lin, Cai, and Li (1998). In addition, we find that chairman turnover of Chinese firms is sensitive to different performance measures for state-controlled firms and private firms.

A government policy aimed at the reduction of state shares in state-owned enterprises (SOE) triggered a crash in Chinas stock market. The sustained depression and spillover even after the policy adjustments were over constitute a puzzle the so-called state-share paradox. The empirical study finds evidence in two dimensions. First, a regime switching model with an absorbing state suggests that government policy switches the regime to liquidity black holes. Second, there is no evidence of light-to-liquidity during the crash, suggesting to model the crash as an aggregate phenomenon of the whole market. To carefully match the evidence, a theoretical model is set up within the framework of market microstructure. The state-share paradox is not a simply instance of news-driven crash. The model shows that Chinas stock market has distinctive features of liquidity production and price discovery. The irregularities of a representative liquidity supporter generate an inverted-S demand curve and give rise to potential liquidity black holes. Multiple equilibria and the resulting large drop in prices arise from supply dynamics of short-run investors, who buy the stock from the primary market liquidate their long positions in the secondary market. This study contributes a rational panics hypothesis to the literature. The rational panics hypothesis is neither an rational model with noise traders, nor a standard rational expectation model under the asymmetric information framework. It is based on homogeneous agents with incomplete information, and is consistent with the evidence of absorbing regime switching and the recent literature on state-dependent preference. Our findings have larger implications for ine¢ ciency of Chinas stock market.

A government policy aimed at the reduction of state shares in state-owned enterprises (SOE) triggered a crash in the Chinese stock market. The sustained depression and spillover even after the policy adjustments were over constitute a puzzle---the so called "state-share paradox". The empirical study finds evidence in two dimensions. First, a regime switching model with an absorbing state suggests that government policy switches the regime to liquidity black holes. Second, there is no evidence of flight-to-liquidity during the crash, suggesting to model the crash as an aggregate phenomenon of the whole market. To carefully match the evidence, a theoretical model is set up within the framework of market microstructure. The model shows that the Chinese stock market has distinctive features of liquidity production and price discovery. The irregularities generate an inverted-S demand curve, gives rise to potential liquidity black holes, and are key features to explain the state-share paradox. This study contributes a rational panics hypothesis to the literature. The rational panics hypothesis is neither a herding model with or without behavioral assumptions, nor a standard rational expectation model under the asymmetric information framework. It is based on homogeneous agents with incomplete information, and is consistent with the evidence of absorbing regime switching and the recent literature on state-dependent preference. Our findings have larger implications for theoretical modeling and policy design.