This study investigates whether the agency conflicts inherent in a dual class ownership structure are associated with the level of firms' tax avoidance. Dual class ownership presents a unique agency problem because insiders control a majority of the votes of a firm despite having claims to a minority of the firm's cash flows. We examine the level of tax avoidance for a sample of dual class firms and find that the extent of tax avoidance declines as the difference between voting rights and cash flow rights increases. We also compare the level of tax avoidance of dual class firms to a sample of propensity matched single class firms and find that dual class firms engage in less tax avoidance as the wedge between insiders' voting rights and cash flow rights increases. These findings are consistent with dual class ownership entrenching managers and allowing them to perform at a suboptimal level. Data Availability: Data used in this study are available from public sources identified in the paper.

This study investigates whether the tax-specific industry expertise of the external audit firm influences its clients' level of tax avoidance. Our results suggest that clients purchasing tax services from their external audit firm engage in greater tax avoidance when their external audit firm is a tax expert. Because the external audit firm potentially influences clients' tax avoidance activities via the provision of tax consulting services and the financial statement audit, we also examine whether the overall expertise (i.e., the combined tax and audit expertise) of the external audit firm is associated with tax avoidance. We find that the external audit firm's overall expertise is generally associated with greater tax avoidance, which suggests that overall experts are able to combine their audit and tax expertise to develop tax strategies that benefit clients from both a tax and financial statement perspective. In combination, our results suggest that the tax-specific industry expertise of the external audit firm plays a significant role in its clients' tax avoidance. Data Availability: Data used in this study are available from public sources identified in the article.

We examine whether cost structure influences tax-motivated income shifting. We predict and find that U.S. multinational corporations (MNCs) with a less rigid cost structure engage in greater levels of tax-motivated income shifting relative to MNCs with a more rigid cost structure. This result is consistent with a less rigid cost structure providing greater flexibility to enable MNCs to take advantage of income-shifting opportunities. Further, we find that this relation is more pronounced when firms face greater costs in adjusting their operations, have less transfer pricing flexibility, and operate in a more uncertain environment. These results suggest that firms with less rigid cost structures possess the strategic operating and accounting flexibility necessary to take advantage of income-shifting opportunities. We provide evidence suggesting that a firm’s cost structure, a fundamental attribute of a firm’s business model, is a distinct and incrementally important determinant of tax-motivated income shifting. Data Availability: All data used in this study are publicly available.

The trade‐off literature asserts that managers weigh the direct benefits of tax avoidance against the associated nontax costs. This literature implies each firm has a unique optimal level of tax avoidance that balances these costs and benefits. Our study is the first to document how quickly the average firm moves toward its optimal level of tax avoidance. We find that the typical firm converges toward its optimum at a rate that ranges from approximately 69 to 84 percent over a three‐year period, depending upon model specifications. Consistent with asymmetric levels of frictions across the tax avoidance distribution, we find the speed of adjustment is greater for firms below their optimal level of tax avoidance than for firms above. We perform additional cross‐sectional analyses to provide insight into some of the frictions that prevent firms from adjusting completely to their optimal level of tax avoidance. We generally find growth firms exhibit slower adjustment speeds and provide limited evidence that both multinational firms and income‐mobile firms exhibit faster adjustment speeds.