How important is human capital at the top of the U.S. income distribution? Most top income is non-wage income, a primary source of which is private "pass-through" business profit. These profits—which can include labor income disguised for tax reasons—accrue to working-age owners of closely-held, mid-market firms in skill-intensive industries. Pass-through business profit falls by three-quarters after owner retirement or premature death. Classifying three- quarters of pass-through profit as human capital income, we find that the typical top earner derives most of his or her income from human capital, not financial capital. Our approach also raises the overall top 1% labor share in 2014 from 45% to 56%. Growth in pass-through profit is explained by both rising productivity and a rising share of value added accruing to owners.

This paper analyzes how patent-induced shocks to labor productivity propagate into worker compensation using a new linkage of US patent applications to US business and worker tax records. We infer the causal effects of patent allowances by comparing firms whose patent applications were initially allowed to those whose patent applications were initially rejected. To identify patents that are ex-ante valuable, we extrapolate the excess stock return estimates of Kogan et al. (2017) to the full set of accepted and rejected patent applications based on predetermined firm and patent application characteristics. An initial allowance of an ex-ante valuable patent generates substantial increases in firm productivity and worker compensation. By contrast, initial allowances of lower ex-ante value patents yield no detectable effects on firm outcomes. Patent allowances lead firms to increase employment, but entry wages and workforce composition are insensitive to patent decisions. On average, workers capture roughly 30 cents of every dollar of patent-induced surplus in higher earnings. This share is roughly twice as high among workers present since the year of application. These earnings effects are concentrated among men and workers in the top half of the earnings distribution, and are paired with corresponding improvements in worker retention among these groups. We interpret these earnings responses as reflecting the capture of economic rents by senior workers, who are most costly for innovative firms to replace.

This paper investigates how tax changes for different income groups affect aggregate economic activity. I construct a measure of who received (or paid for) tax changes in the postwar period using tax return data from NBER's TAXSIM. I aggregate each tax change by income group and state. Variation in the income distribution across U.S. states and federal tax changes generate variation in regional tax shocks that I exploit to test for heterogeneous effects. I find that the positive relationship between tax cuts and employment growth is largely driven by tax cuts for lower-income groups, and that the effect of tax cuts for the top 10% on employment growth is small.

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We study state taxes as a potential source of spatial misallocation in the United States. We build a spatial general equilibrium framework that incorporates salient features of the U.S. state tax system, and use changes in state tax rates between 1980 and 2010 to estimate the model parameters that determine how worker and firm location respond to changes in state taxes. We find that heterogeneity in state tax rates leads to aggregate welfare losses. In terms of consumption equivalent units, harmonizing state taxes increases worker welfare by 0.6 percent if government spending is held constant, and by 1.2 percent if government spending responds endogenously. Harmonization of state taxes within Census regions achieves most of these gains. We also use our model to study the general equilibrium effects of recently implemented and proposed tax reforms.

This paper documents facts about the state corporate tax structure—tax rates, base rules, and credits—and investigates its consequences for state tax revenue and economic activity. We present three main findings. First, tax base rules and credits explain more of the variation in state corporate tax revenues than tax rates do. Second, although states typically do not offset tax rate changes with base and credit changes, the effects of tax rate changes on tax revenue and economic activity depend on the breadth of the base. Third, as states have narrowed their tax bases, the relationship between tax rates and tax revenues has diminished. Overall, changes in state tax bases have made the state corporate tax system more favorable for corporations and are reducing the extent to which tax rate increases raise corporate tax revenue.

"Pass-through” businesses like partnerships and S-corporations now generate over half of U.S. business income and account for much of the post-1980 rise in the top- 1% income share. We use administrative tax data from 2011 to identify pass-through business owners and estimate how much tax they pay. We present three findings. (1) Relative to traditional business income, pass-through business income is substantially more concentrated among high-earners. (2) Partnership ownership is opaque: 20% of the income goes to unclassifiable partners, and 15% of the income is earned in circularly owned partnerships. (3) The average federal income tax rate on U.S. pass- through business income is 19%|much lower than the average rate on traditional corporations. If pass-through activity had remained at 1980's low level, strong but straightforward assumptions imply that the 2011 average U.S. tax rate on total U.S. business income would have been 28% rather than 24%, and tax revenue would have been approximately $100 billion higher.

Links: Video of Presentation. Discussion with Jim Poterba. NBER Interview on Tax Policy and the Economy.
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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.

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