This paper examines the effect of targets' participation in tax shelters on takeover premiums in mergers and acquisitions. Using a novel data set in which targets disclose that they have not participated in tax shelters, we find that targets that make this statement in their merger filings are associated with 4.6 percent higher takeover premiums, on average. These findings suggest that acquirers are concerned about the potential future liabilities when targets have engaged in tax sheltering. Consistent with this interpretation, the results also indicate that the positive association between targets' nonsheltering disclosure and acquisition premiums is stronger for less tax‐aggressive acquirers. This paper demonstrates the importance of targets' aggressive tax positions in the determination of premiums offered to targets' shareholders.

In‐house human capital tax investment is a significant input to a firm's tax decisions. Yet, due to the lack of data on corporate in‐house tax departments, there is little empirical evidence on how tax departments are associated with tax planning and compliance outcomes. We expect the size of tax departments to be positively associated with the effectiveness of tax planning and compliance. Using hand‐collected data on the number of corporate tax employees in S&P 1500 firms over the 2009–2014 period, we find that firms with larger tax departments are associated with lower and less volatile cash effective tax rates. Furthermore, using tax employees' specialization, we identify tax departments' relative focus on planning or compliance and document a trade‐off between tax avoidance and tax risk. Specifically, tax departments with more of a tax planning focus have incrementally greater tax avoidance but higher tax risk, whereas tax departments with more of a tax compliance focus have incrementally lower tax risk but higher tax rates. Overall, this paper contributes to the literature by looking inside the “black box” of corporate tax departments and shedding light on the importance of human capital tax investment for tax outcomes.

We undertake the first empirical analysis of profit shifting by U.S. firms during foreign tax holidays. We show that foreign tax holidays have become a prevalent and powerful tax planning strategy among U.S. firms. We find that U.S. firms significantly increase their outbound profit shifting while participating in foreign tax holidays. However, we also find that profit shifting associated with tax holidays comes at the cost of increased tax uncertainty. Our results have important implications for policy making and for understanding firm behavior.

We investigate whether judges’ political ideology affects corporate tax behaviors. We find that firms engaging in less aggressive tax planning when Circuit Court judges are more liberal. Cross-sectionally, the deterrent effect of liberal judge ideology is more pronounced for firms that engage in judiciary-sensitive tax strategies, face higher enforcement risk from the Internal Revenue Service (IRS), or have larger reputational costs from tax disputes. Our findings further suggest that liberal judge ideology reduces firms’ R&D investments and market value by constraining tax planning. Overall, our evidence highlights the importance of judge ideology for firm behavior in the context of corporate tax planning.