My thesis examines the intersection of government and corporate finance through three key studies. The first chapter investigates how regulatory agencies' activities impact firm performance by developing an Agency Activity Index (AAI) for four major federal agencies: the EPA, FDA, OSHA, and SEC. My findings show that higher levels of agency activity (regulation and enforcement) are associated with lower firm operating performance, especially for firms heavily exposed to these agencies. This negative impact is also reflected in the stock market, where significant regulatory changes, such as Sarbanes-Oxley, cause stock prices to drop for these firms. This chapter investigates the impact of political polarization on the careers of equity analysts. It reveals that analysts whose political views diverge from those of the executives at the companies they cover are likely to experience career setbacks, which interestingly, are not due to their performance levels. Performance comparisons show no significant differences between misaligned and non-misaligned analysts. Setbacks are more severe when analysts' employers, typically brokerage houses, have financial ties to the firms they cover, indicating political disagreements impact careers more than performance metrics. Politically misaligned analysts often provide more thorough analyses, improving firm information quality. The third chapter studies the "revolving door" phenomenon between the FDA and pharmaceutical companies. My research shows that hiring former FDA employees boosts drug approval rates and innovation within these firms. This benefit is particularly strong when the hired individuals held high-ranking positions at the FDA. Importantly, this higher approval rate is without compromising drug quality, as evidenced by the lack of increased drug recalls. Instead, former FDA employees bring valuable knowledge and efficiency, enhancing the firms' ability to navigate regulations and innovate effectively.