Of Coase, Calabresi, and Optimal Tax Liability

58 Pages Posted: 31 Jan 2009 Last revised: 23 Mar 2009

See all articles by Kyle D. Logue

Kyle D. Logue

University of Michigan Law School

Joel B. Slemrod

University of Michigan, Stephen M. Ross School of Business; National Bureau of Economic Research (NBER)

Date Written: January 30, 2009

Abstract

The Coase Theorem and the vast literature it inspired explore two basic questions: to whom should responsibility for external harms be assigned and how will that assignment matter. Building on the Coasean insight in the torts context, Guido Calabresi observed that the assignment of tort liability can indeed matter from an efficiency perspective and should, under certain assumptions, be assigned to the "cheapest cost avoider." This article applies a similar Coasean/Calabresian framework to a related (though not identical) set of questions in the tax context: To whom should the responsibility for remitting taxes be assigned and when and how will that assignment matter? Following Calabresi's canonical formulation for the design of an optimal tort system, we conclude that an optimal tax remittance regime requires that tax liabilities be assigned so as to minimize the overall social costs of compliance and administration for a given level of achievement of the tax law's desired distributional and revenue goals. This will sometimes mean assigning tax remittance responsibility to the lowest-compliance-cost remitter, and other times not - if that party happens also to be the lowest-cost liability avoider (the party best able to evade the tax).

This comparison of tax remittance responsibility and tort remittance responsibility produces a number of positive and normative insights. For example, it helps to explain why the remittance responsibility for the retail sales tax lies primarily with the sellers rather than the buyers, as well as why we have wage withholding for the income tax. And it helps to explain some existing types of non-wage withholding, such as withholding on payments to foreign taxpayers. This framework also supports a number of reforms in the current U.S. regime for tax enforcement such as expanding the withholding requirement to payments made to independent contractors, which are a type of payment that currently contributes significantly to the overall U.S. federal tax gap.

Keywords: Coase Theorem, optimal tort system

Suggested Citation

Logue, Kyle D. and Slemrod, Joel B., Of Coase, Calabresi, and Optimal Tax Liability (January 30, 2009). U of Michigan Law & Economics, Olin Working Paper No. 09-004, Available at SSRN: https://ssrn.com/abstract=1335924 or http://dx.doi.org/10.2139/ssrn.1335924

Kyle D. Logue (Contact Author)

University of Michigan Law School ( email )

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Joel B. Slemrod

University of Michigan, Stephen M. Ross School of Business ( email )

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National Bureau of Economic Research (NBER) ( email )

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