Optimal redistributive taxation with both extensive and intensive responses

We study optimal income taxation when labor supply reacts along the intensive and extensive margins. Individuals are heterogeneous across two unobserved dimensions: their skill and disutility of participation. We develop a new method to analytically derive conditions under which optimal marginal tax rates are non-negative everywhere. It is typically optimal to provide a distinct level of transfer to the non-employed and to workers with negligible earnings. Numerical simulations illustrate these properties for the US. We also apply our method to sign output distortions in other adverse selection frameworks with random participation, namely the monopoly nonlinear pricing and the regulatory monopoly problems.     

Optimal grouping of commodities for indirect taxation

Indirect taxes contribute to a sizeable part of government revenues around the world. Typically there are few different tax rates, and the goods are partitioned into classes associated with each rate. The present paper studies how to group the goods in these few classes. We take as given the number of tax rates and study the optimal aggregation (or classification) of commodities of the fiscal authority in a second best setup. The results are illustrated on data from the United Kingdom.     

Optimal marginal and average income taxation under maximin

Using the Mirrlees optimal income tax model under maximin, we derive fairly mild conditions for a decreasing marginal tax rate throughout the skill distribution with no bunching, a strictly concave tax function in income and a single-peaked average tax schedule. Assuming additive preferences and an isoelastic disutility of labor function, these tax profiles are implied by aggregate skills that are non-decreasing with the skill level. If preferences are quasilinear in leisure or in consumption, these tax profiles are also obtained under a large set of skill distributions.     

Optimal nonlinear income taxation with a finite population

In the standard optimal income taxation problem, tax payments depend only on each consumer's own actions. Piketty [J. Econ. Theory 61 (1993) 23-41] shows that, if one individual's tax schedule depends on others’ actions and the government knows the exact ability distribution, it can implement any undistorted allocation as the unique revelation game outcome. If some individuals misreveal their types, Piketty's mechanism may assign infeasible allocations. We require that tax schedules must balance the government budget for every possible vector of revelations. When individuals reveal their type by simple announcements, all undistorted allocations can be still implemented, even with off-equilibrium feasibility constraints.     

Dynamic inconsistency and non-preferential taxation of foreign capital

When capital is sunk after it is invested, a host government facing heterogeneous foreign investors has a strong incentive to reduce preferential taxes over time in order to attract less eager investors while fully expropriating past investors. This induces investors to wait rather than invest in the initial period, and leads to loss of tax revenue. This dynamic inconsistency problem is resolved if the host government commits to non-preferential taxation in each period even if it does not commit to future tax rates.     

Voting over income taxation

A major problem of the positive theory of income taxation is to explain why statutory income tax schedules in practice are marginal-rate progressive. While it is commonly believed that this is but a simple consequence of the fact that the number of relatively poor voters exceeds that of richer voters in general, putting this contention in a voting equilibrium context is not a trivial task. We do this here in the context of nonlinear taxation and attempt to provide a formal argument in support of this heuristic claim. We first establish the existence of mixed strategy equilibria and identify certain cases in which marginal-rate progressive taxes are chosen almost surely by the political parties. Unfortunately, we also find that if the tax policy space is not artificially constrained, the support of at least one equilibrium cannot be contained within the set of marginal-rate progressive taxes.     

Optimal education and pensions in an endogenous growth model

In OLG economies with life-cycle saving and exogenous growth, competitive equilibria in general fail to achieve optimality because individuals accumulate amounts of physical capital that differ from the one that maximizes welfare along a balanced growth path (the Golden Rule). With human capital, a second potential source of departure from optimality arises, related to education decisions. We propose to recover the Golden Rule of physical and also human capital accumulation. We characterize the optimal policy to decentralize the Golden Rule balanced growth path when there are no constraints for individuals to finance their education investments, and show that it involves education taxes. Also, when the government subsidizes the repayment of education loans, optimal pensions are positive.     

Optimal nonlinear income taxation with productive government expenditure

This paper develops an endogenous growth model with a production externality and nonlinear income taxation, and uses it to examine how the fiscal authority devises its nonlinear tax structure from the viewpoint of welfare maximization. It is found that, in the Barro (1990) model, Pareto optimality can be achieved if both policy instruments for the tax scalar and the extent of the tax progressivity/regressivity are set optimally.     

Redistributive politics with distortionary taxation

This paper proposes a first step towards a positive theory of tax instruments. We present a model of redistributive politics that extends those of Myerson [R. Myerson, Incentives to cultivate minorities under alternative electoral systems, Amer. Polit. Sci. Rev. 87 (1993) 856-869] and Lizzeri and Persico [A. Lizzeri, N. Persico, The provision of public goods under alternative electoral incentives, Amer. Econ. Rev. 91 (2001) 225-239]. Two politicians compete in terms of targeted redistributive promises financed through distortionary taxes. We solve for the case of both targetable and non-targetable taxes. We prove that there is an imperfect efficiency-targetability trade off on the tax side. Politicians prefer targetable taxes over non-targetable ones, especially when the latter are less efficient. Yet, targetable taxation is always used even when it is very inefficient compared to non-targetable taxes.     

Keeping up with the Joneses, consumer ethnocentrism, and optimal taxation

This paper sets up a two-good (domestically- and internationally-produced goods) model of a small open economy with consumption externalities and uses it to examine the optimal taxation. Since keeping up with the Joneses leads an individual consumption's to impose a negative externality on the consumption of others, a consumption tax and tariff are thereby socially desirable to correct this distortion. Due to the fact that the government has to account for additional distortion caused by consumer ethnocentrism and that keeping up with the Joneses in the consumption of domestic goods tends to reinforce the influence of ethnocentrism on the purchase of domestic products, the consumption of imported goods is subject to a higher tariff rate because of the cross-market externality. Of interest, if consumption only involves an own-market externality, there is no cyclical consequence for the optimal taxes. However, if consumption involves both own- and cross-market externalities, the optimal tariff is state-contingent and, more specifically, is countercyclical.     

Age-Dependent Taxation and the Optimal Retirement Benefit Formula

Abstract. This paper presents a comprehensive view of lifetime taxation including both explicit taxation through the general tax system and implicit taxation via the retirement benefit formula. Differences in productivity between individuals are unobservable, which provides a rationale for the use of distortionary taxes. It is shown that the optimal structure of age-dependent taxation can be characterized by a generalized Ramsey formula. Furthermore, the paper derives the optimal retirement benefit formula in the presence of the general tax system and examines the compatibility with the financial stability of the pension system.     

The limitations of decentralized world redistribution: An optimal taxation approach

A centralized scheme of world redistribution that maximizes a border-neutral social welfare function, subject to the disincentive effects it would create, generates a drastic reduction in world consumption inequality, dropping the Gini coefficient from 0.69 to 0.25. In contrast, an optimal decentralized (i.e., with no cross-country transfers) redistribution has a miniscule effect on world income inequality. Thus, the traditional public finance concern about the excess burden of redistribution cannot explain why there is so little world redistribution.Actual foreign aid is vastly lower than the transfers under the simulated world income tax, suggesting that voluntary world transfers - subject to a free-rider problem - produces an outcome that is consistent with rich countries such as the United States either placing a much lower value on the welfare of foreigners, or else expecting that a very significant fraction of cross-border transfers is wasted. The product of the welfare weight and one minus the share of transfers that are wasted constitutes the implicit weight that the United States assigns to foreigners. We calculate that value to be as low as 1/2000 of the value put on the welfare of an American, suggesting that U.S. policy is consistent with social preferences that place essentially no value on the welfare of the citizens of the poorest countries, or that implicitly assumes that essentially all transfers are wasted.     

Optimal contracting with dynastic altruism: Family size and per capita consumption

We use a Barro–Becker model of endogenous fertility, in which parents are subject to idiosyncratic shocks that are private information (either to labor productivity or taste for leisure), to study the efficient degree of consumption inequality in the long run. The planner uses the trade-off between family size and future consumption and leisure, to provide incentives for workers to reveal their shocks. We show that in this environment, the optimal dynamic contract no longer features immiseration in consumption. We also discuss the implications of the model on the long run properties of family size in the optimal contract and show that the long run trend in dynasty size can be either positive or negative depending on parameters.     

Tax Competition, Capital Mobility and Innovation in the Public Sector

Abstract. The paper analyses the impact of tax competition on innovation in the public sector. It is shown that the effects of increased mobility of the tax base on innovation and growth are ambiguous. The negative relationship is more likely, however. Moreover, it is shown that a Leviathan government may be induced to spend a larger share of its budget on unproductive activities.     

Progressive taxation,tax exemption,and corporate liquidation policy

This paper develops a real options model of a firm that operates in continuous time with an infinite horizon. The firm receives stochastic profit flows that are subject to progressive taxation. Tax progression arises from an exogenously given tax exemption threshold that makes the average tax rate increase with the tax base. The firm possesses an option to liquidate its operation, which is optimally exercised when the firm's profit flow reaches an endogenously determined threshold level (the liquidation trigger) from above. We show that the firm's liquidation trigger under progressive taxation increases with either a reduction in the tax exemption threshold or an increase in the corporate income tax rate. Corporate income taxes are thus not neutral when tax schedules are progressive.     

Corporate taxation, debt financing and foreign-plant ownership

This paper compares domestically and foreign-owned plants with respect to their debt-to-assets ratio and analyzes to which extent the difference is systematically affected by corporate taxation. To derive hypotheses about influence of corporate taxation on a firm's debt financing we adapt a standard model of taxation and financing decisions of firms for the case of international debt shifting activities of foreign-owned firms. We estimate the average difference between a foreign-owned and a domestically owned firm's debt ratio, treating the mode of ownership as endogenous. Using data from 32,067 European firms, we find that foreign-owned firms on average exhibit a significantly higher debt ratio than their domestically owned counterparts in the host country. Moreover, this gap in the debt ratio increases with the host country's statutory corporate tax rate.     

Optimal redistribution with unobservable disability: Welfarist versus non-welfarist social objectives

This paper examines the optimal non-linear income and commodity tax when the same labor disutility can receive two alternative interpretations, taste for leisure or disability, but the disability is not readily observable. We compare the optimal policy under alternative social objectives, welfarist and non-welfarist, and conclude that the non-welfarist objective, in which the planner gives a higher weight to the disutility of labor of the disabled individuals, is the only reasonable specification. It has some foundation in the theory of responsibility; further, unlike the other specifications it yields an optimal solution that may involve a lower labor supply requirement from disabled individuals.     

Optimal accumulation in an endogenous growth setting with human capital

This paper considers a three-overlapping-generations model of endogenous growth wherein human capital is the engine of growth. It first contrasts the laissez-faire and the optimal solutions. Three possible accumulation regimes are distinguished. Then it discusses a standard set of tax-transfer instruments that allow for decentralization of the social optimum. Within the limits of our model, the rationale for the standard pattern of intergenerational transfers (the working-aged financing the education of the young and the pension of the old) is seriously questioned. On pure efficiency grounds, the case for generous public pensions is rather weak.