Boardroom backscratching and stock price crash risk
研究发现，当CEO和董事同时获得过高薪酬时（即董事会互惠），会抑制董事会的有效监督，导致坏消息囤积，从而显著增加股价崩盘风险。外部监督机制能削弱这一效应。
Abstract We empirically capture boardroom backscratching, or cronyism, as when a firm's Chief Executive Officer (CEO) and directors concurrently receive excessive remuneration. We argue that boardroom backscratching can inhibit a board's constructive criticism and monitoring, resulting in a greater likelihood of bad news hoarding. Using 14,104 US firm‐year observations spanning 1999–2020, we document a significant positive relationship between boardroom backscratching and stock price crash risk. In additional analyses, we show that boardroom backscratching firms produce less readable annual reports and engage in greater upward real earnings management as channels for concealing bad news. We also find that external monitoring mechanisms weaken the positive association between boardroom backscratching and stock price crash risk. Our main findings withstand several endogeneity tests including propensity score matching, entropy balancing, difference‐in‐differences analysis using firms’ commencement of boardroom backscratching and CEO turnover event analysis. Our study offers insights to securities regulators and policymakers to revisit the notion of board independence, develop relevant market oversight and revise director and executive remuneration disclosure requirements so as to mitigate adverse stock market performance associated with boardroom backscratching.