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Income inequality is high and persistent in developing countries. In this paper, we ask what role taxation can or might play in reducing inequality in low and middle-income countries. Drawing on the recent literature, three findings emerge. Due to both structural factors and limited enforcement capacity, the effective distributional impacts of taxes often deviate from their 'statutory' objectives, in ways that are hard to predict based on evidence from high-income countries. Moreover, administrative reforms which are meant to be distributionally neutral end up having significant equity impacts because of the practical realities of implementation. Finally, the global challenges which tax authorities face to tax the very top of the income distribution appear to be even more pronounced in developing countries. We conclude by offering thoughts on future research and emphasize the need to carefully study equity characteristics of taxes at each stage of a country's development path.

A common objection to “sin taxes”—corrective taxes on goods that are thought to be overconsumed, such as cigarettes, alcohol, and sugary drinks—is that they often fall disproportionately on low-income consumers. This paper studies the interaction between corrective and redistributive motives in a general optimal taxation framework and delivers empirically implementable formulas for sufficient statistics for the optimal commodity tax. The optimal sin tax is increasing in the price elasticity of demand, increasing in the degree to which lower-income consumers are more biased or more elastic to the tax, decreasing in the extent to which consumption is concentrated among the poor, and decreasing in income effects, because income effects imply that commodity taxes create labor supply distortions. Contrary to common intuitions, stronger preferences for redistribution can increase the optimal sin tax, if lower-income consumers are more responsive to taxes or are more biased. As an application, we estimate the optimal nationwide tax on sugar-sweetened beverages, using Nielsen Homescan data and a specially designed survey measuring nutrition knowledge and self-control. Holding federal income tax rates constant, our estimates imply an optimal federal sugar-sweetened beverage tax of 1 to 2.1 cents per ounce, although optimal city-level taxes could be as much as 60% lower due to cross-border shopping.

This paper estimates the incidence of corporate taxes on wages using a 20-year panel of German municipalities exploiting 6,800 tax changes for identification. Using event study designs and difference-in-differences models, we find that workers bear about one-half of the total tax burden. Administrative linked employer-employee data allow us to estimate heterogeneous firm and worker effects. Our findings highlight the importance of labor market institutions and profit-shifting opportunities for the incidence of corporate taxes on wages. Moreover, we show that low-skilled, young, and female employees bear a larger share of the tax burden. This has important distributive implications.

Using new narrative measures of exogenous variation in marginal tax rates associated with postwar tax reforms in the United States, this study estimates short-run tax elasticities of reported income of around 1.2 based on time series from 1946 to 2012. Estimated elasticities are larger in the top 1% of the income distribution but are also positive and statistically significant for other income groups. Previous time series studies of tax returns data have found little evidence for income responses to taxes outside the top of the income distribution. The different results in this article arise because of additional efforts to account for dynamics, expectations, and especially the endogeneity of tax policy decisions. Marginal rate cuts lead to increases in real GDP and declines in unemployment. There is also evidence that the responses are to marginal tax rates rather than average tax rates. Counterfactual tax cuts targeting the top 1% alone are estimated to have short-run positive effects on economic activity and incomes outside of the top 1%, but to increase inequality in pretax incomes. Cuts for taxpayers outside of the top 1% also lead to increases in incomes and economic activity, but with a longer delay.

This paper estimates the incidence of state corporate taxes on the welfare of workers, landowners, and firm owners using variation in state corporate tax rates and apportionment rules. We develop a spatial equilibrium model with imperfectly mobile firms and workers. Firm owners may earn profits and be inframarginal in their location choices due to differences in location-specific productivities. We use the reduced-form effects of tax changes to identify and estimate incidence as well as the structural parameters governing these impacts. In contrast to standard open economy models, firm owners bear roughly 40 percent of the incidence, while workers and landowners bear 30-35 percent and 25-30 percent, respectively.

Since 2006, US households have received more than $18 billion in federal income tax credits for weatherizing their homes, installing solar panels, buying hybrid and electric vehicles, and other “clean energy” investments. We use tax return data to examine the socioeconomic characteristics of program recipients. We find that these tax expenditures have gone predominantly to higher-income Americans. The bottom three income quintiles have received about 10% of all credits, while the top quintile has received about 60%. The most extreme is the program aimed at electric vehicles, where we find that the top income quintile has received about 90% of all credits. By comparing to previous work on the distributional consequences of pricing greenhouse gas emissions, we conclude that tax credits are likely to be much less attractive on distributional grounds than market mechanisms to reduce greenhouse gases (GHGs).

To fight evasion, many developing countries use production-inefficient tax policies. This includes minimum tax schemes whereby firms are taxed on either profits or turnover, depending on which tax liability is larger. Such schemes create nonstandard kink points, which allow for eliciting evasion responses to switches between profit and turnover taxes using a bunching approach. Using administrative data on corporations in Pakistan, we estimate that turnover taxes reduce evasion by up to 60–70 percent of corporate income. Incorporating this in a calibrated optimal tax model, we find that switching from profit to turnover taxation increases revenue by 74 percent without reducing aggregate profits.

We extend five principles of tax incidence under perfect competition to a general model of imperfect competition. The principles cover (1) the independence of physical and economic incidence, the (2) qualitative and (3) quantitative manner in which taxes are split between consumers and producers, (4) the determinants of tax pass-through, and (5) the integration of local incidence to determine the overall division of surplus. We show how these principles can be used to simplify and generalize the analysis of a range of economic questions such as the optimal procurement of new markets and the welfare effects of third-degree price discrimination.

On December 22, 2017, President Donald Trump signed the Tax Cuts and Jobs Act (TCJA), the most sweeping revision of US tax law since the Tax Reform Act of 1986. The law introduced many significant changes. However, perhaps none was as important as the changes in the treatment of traditional “C” corporations—those corporations subject to a separate corporate income tax. Beginning in 2018, the federal corporate tax rate fell from 35 percent to 21 percent, some investment qualified for immediate deduction as an expense, and multinational corporations faced a substantially modified treatment of their activities. This paper seeks to evaluate the impact of the Tax Cuts and Jobs Act to understand its effects on resource allocation and distribution. It compares US corporate tax rates to other countries before the 2017 tax law, and describes ways in which the US corporate sector has evolved that are especially relevant to tax policy. The discussion then turns the main changes of the Tax Cuts and Jobs Act of 2017 for the corporate income tax. A range of estimates suggests that the law is likely to contribute to increased US capital investment and, through that, an increase in US wages. The magnitude of these increases is extremely difficult to predict. Indeed, the public debate about the benefits of the new corporate tax provisions enacted (and the alternatives not adopted) has highlighted the limitations of standard approaches in distributional analysis to assigning corporate tax burdens.