Constrained Inefficiency and Optimal Taxation with Uninsurable Risks

When individuals' labor and capital income are subject to uninsurable idiosyncratic risks, should capital and labor be taxed, and if so how? In a two‐period general equilibrium model with production, we derive a decomposition formula of the welfare effects of these taxes into insurance and distribution effects. This allows us to determine how the sign of the optimal taxes on capital and labor depend on the nature of the shocks and the degree of heterogeneity among consumers' income, as well as on the way in which the tax revenue is used to provide lump‐sum transfers to consumers. When shocks affect primarily labor income and heterogeneity is small, the optimal tax on capital is positive. However, in other cases a negative tax on capital is welfare‐improving.     

Optimal human capital policies under the endogenous choice of educational types

This study examines optimal human capital policies under nonlinear labor and capital income taxes in the presence of consumption value of education in a two‐period setting. We show that when individuals can choose educational types differing by the relative importance of consumption value and production value, education subsidies for low‐type individuals should not equal an efficient level that offsets distortions induced by nonlinear taxes on labor and capital income. Our findings imply that education policy does not restore efficiency, or the Diamond–Mirrlees production efficiency theorem fails. Moreover, capital income taxation is optimal, which means that the Atkinson–Stiglitz theorem breaks down.     

Multistage public education,voting, and income distribution

This paper proposes a theory to study the formulation of education policies and human capital accumulation. The government collects income taxes and allocates tax revenue to primary and higher education. The tax rate and the allocation rule are both endogenously determined through majority voting. The tax rate is kept at a low level, and public funding for higher education is not supported unless the majority of individuals have human capital above some threshold. Although public support for higher education promotes aggregate human capital accumulation, it may create long-run income inequality because the poor are excluded from higher education.     

Optimal fiscal policy in a model with inherited aspirations and habit formation

In this paper, we analyze optimal fiscal policies in an overlapping generations framework, where preferences exhibit aspirations in consumption and environmental quality as well as habit formation. We focus on the second best policies when the government needs to finance a given stream of public expenditures by using distortionary taxes. We derive necessary and sufficient conditions under which the competitive equilibrium is characterized by levels of capital and environmental quality that are too small and a level of labor supply that is too large. Our numerical simulations show that an optimal fiscal policy can be used as an effective stabilization device and that when consumption taxes are fixed, the planner implements maintenance investment and capital income subsidies while financing public spending through labor and fixed consumption taxes.     

Political economy of taxation,debt ceilings,and growth

This study presents voting on policies, including labor and capital income taxes and public debt, in an overlapping-generations model with physical and human capital accumulation, and analyzes the effects of a debt ceiling on a government's policy formation and its impact on growth and welfare. The results show that the debt ceiling induces the government to shift the tax burdens from the older to younger generations, but stimulates physical capital accumulation and may increase public education expenditure, resulting in a higher growth rate. Alternatively, the debt ceiling is measured from the viewpoint of a benevolent planner and lowering the debt ceiling (i.e., tightening fiscal discipline) makes it possible for the government to approach the planner's allocation in an aging society.     

Optimal climate and fiscal policy in an OLG economy

This paper develops a climate–economy model to study the joint design of optimal climate and fiscal policies in economies with overlapping generations (OLGs). I demonstrate how capital taxation, if optimal, drives a wedge between the market costs of carbon (the net present value of marginal damages using the market interest rate) and the Pigouvian tax (the net present value of marginal damages using the consumption discount rate of successive OLGs). In contrast to deterministic infinitely lived representative agent models, at the optimum, the capital income tax is positive, the carbon price equals the market costs of carbon but it falls short of the Pigouvian tax when (i) preferences are not separable over consumption and leisure; and (ii) labor income taxes cannot be age-dependent. I also show that restrictions on climate change policy provide a novel rationale for positive capital income taxes.     

Human capital,externalities and growth in an overlapping generations model

We consider an overlapping generations model with endogenous labor supplies by young and old and a human capital accumulation process that relies on the interaction of these two types of labor. This interaction is not understood by the market hence we analyze fiscal policies designed to remedy this. We argue that taxes must be acceptable to people alive at the time of planning. This makes many proposed taxes unfeasible. Two distinct paths to growth emerge; one through increased savings and another through increased workforce participation. The long run rate of growth depends entirely on human capital but we find this to be of little relevance. Some simulation results are presented for two stylized economic blocks calibrated on the USA and the EURO-zone.     

Reexamining the interaction between innovation and capital accumulation

In endogenous growth models with innovation and capital accumulation Arnold [J. Macroeconomics 20 (1998) 189] and Blackburn et al. [J. Macroeconomics 22 (2000) 81] show that long-run growth of per capita income is independent of innovation activities; it is solely determined by preferences and the human capital accumulation technology. As a result, government policies do not affect long-run growth. This paper develops an endogenous growth model with innovation and (physical and human) capital accumulation to show that long-run growth depends on both innovation and capital accumulation technologies as well as on preferences and that government taxes and subsidies can have effects on the long-run growth rate.     

AGE‐DEPENDENT TAXES WITH ENDOGENOUS HUMAN CAPITAL FORMATION

We assess the gains attained by the introduction of age‐dependent labor income taxes in an overlapping generations economy where individuals live a meaningful life cycle and endogenously accumulate human capital. The model is sufficiently rich to isolate the role of general equilibrium effects, credit market imperfections, and different forms of human capital accumulation. The large welfare gains we obtain cannot be attained without age dependence, nor can they be attained with age‐dependent taxes if progressivity of labor income taxes and capital income tax rates are not suitably adjusted to profit from the complementarity of these instruments.     

How to Achieve the Take-off into Sustained Growth: A Case Study for Slovenia

In this paper, we show that successful policy aimed at enhancing economic growth in the long run must be based on policies which improve human capital and technological progress. This is applied to Slovenia, a small open economy in the European Union and the Euro Area. In particular, we investigate how fiscal policies should be designed to support economic growth without violating the European Union Stability and Growth Pact. Using the SLOPOL10 model, an econometric model of the Slovenian economy, we analyse the effects of different fiscal policies in Slovenia over the next few years by means of simulations. The fiscal policy multipliers of the Slovenian economy are small and short-lived, which renders demand-side expansionary fiscal policies inappropriate as a means of achieving higher growth. However, if an increase in government expenditures directly related to technological progress is implemented (such as better funding for tertiary education or subsidies for firms’ investments in research and development), this can trigger a path of output which is permanently higher than that of the baseline simulation. Reducing income taxes and social security contributions has strong positive effects on employment. This result shows that the key to prosperity and sustained growth is investment in human capital and technology, also for a small open economy like Slovenia.     

Taxation without commitment

This paper considers a Ramsey model of linear capital and labor income taxation in which a benevolent government cannot commit ex-ante to a sequence of policies for the future. In this setup, if the government is forced to keep budget balance in every period, then it may not be able to sustain zero capital taxes in the long run, as shown in Benhabib and Rustichini (J Econ Theory 77:231–259, 1997) and Phelan and Stachetti (Econometrica 69:1491–1518, 2001). However, (Dominguez in J Econ Theory 135:159–170, 2007) shows that if the government is allowed to borrow and lend to households, the optimal capital income tax still converges to zero in the long run, as long as the value of defaulting is independent of the level of government debt. This paper provides a game theoretic setup with government debt where the value of the worst equilibrium only depends on the initial level of capital and can be determined in advance. This implies that under our assumptions the best sustainable equilibrium has zero capital taxes in the long run, even in the absence of government commitment.     

Optimal income taxation with human capital accumulation and limited record keeping

This paper characterizes optimal income taxes in a dynamic economy where human capital is unobservable and the government is restricted to use taxes that depend only on current income. I show that unobservability of human capital tends to decrease the labor wedge, while the effect on the human capital wedge is uncertain. I also analyze the relationship between optimal taxes in economies with and without endogenous human capital and identify two qualitative reasons why the optimal tax codes will differ. I perform numerical simulations to calculate the quantitative relevance of endogenous human capital formation for optimal tax policy. I find that endogenous human capital lowers marginal tax rates by about 9% on average, as compared with a static model without human capital.     

"十一五"时期促进我国企业技术进步的税收支持政策建议

在“十一五”时期,完善税收支持政策,促进我国企业技术进步,对于提升我国的国际竞争力、实现中华民族伟大复兴具有重要意义。为此,我们提出以下政策建议:巩固和完善“两项”政策,推进增值税转型,统一内外资企业所得税,进一步完善各项具体政策,完善鼓励产学研结合的政策,完善激励人力资本开发的政策,增设低技术污染税,完善税收与财政支持政策的配套使用。     

Optimal Monetary Policy, Taxes, and Public Debt in an Intertemporal Equilibrium

This article is devoted to a study of the optimal monetary and fiscal policies within the framework of an overlapping generations model with cash-in-advance constraints. We first characterize the intertemporal equilibrium. Then we show how to decentralize the optimal growth path using available policy instruments (i.e., labor income and capital taxes, public debt, money supply). Between the four instruments: wages and capital taxes, debt and monetary policy, one is redundant among the three last which implies that the Friedman Rule is only a special case.     

Time‐consistent optimal fiscal policy*

This article studies the properties of optimal fiscal policy in a stochastic growth model when the government cannot commit itself beyond the next period's capital income tax rate. We find that the results contrast markedly with those under full commitment. First, capital income tax rates are very high (65% on average versus close to zero on average under full commitment). Second, labor income taxes are rather low on average (about 12% versus a value of around 31% under full commitment). Finally, labor income taxes are quite volatile, whereas under full commitment their standard deviation is essentially zero.     

Capital depreciation allowances,redistributive taxation,and economic growth

Are capital depreciation allowances when coupled with capital income taxes good instruments for redistribution in the long run? In a simple two-agent-economy I find that accelerated depreciation is good for growth, but bad for redistribution. The opposite holds for capital income taxes. However, in a feedback Stackelberg equilibrium, where the government is the leader and the private sector the follower, the depreciation allowance is maximal in the long run, time-consistent optimum. This removes the accumulation distortion of capital income taxes. Furthermore, the latter, and so redistribution, is found to be generically nonzero in the time-consistent optimum, and depends on the social weight of transfers receivers, the pretax factor income distribution, the intertemporal elasticity of substitution and the time preference rate. Thus, accelerated depreciation allowances are an important indirect tool for redistribution. The tax scheme allows for a separation of “efficiency” and “equity” concerns for redistributive policies.     

EFFECTS OF TAXES AND BENEFITS ON INCOME DISTRIBUTION IN KOREA

This paper examines the redistributive effects of Korea's fiscal policies, including consumption taxes and in‐kind benefits. Using the Household Income and Expenditure Survey of 2007, we find that taxes and transfers reduce income inequality in Korea by 13.8 percent. Contrary to the popular belief that direct taxes are the key tool for redistribution, in‐kind benefits, direct taxes, and social security contributions all decrease the Gini coefficient by 6.7, 4.7, and 2.9 percentage points, respectively. The redistributive effect of consumption taxes is small and negative (?0.5 percentage point). Policy simulations indicate that education spending financed by the personal income tax has a positive redistributive effect and that the lower 70 percent of households enjoy positive net benefits. Spending targeting the poor has a strong redistributive effect, which implies low popularity because the majority of households face net losses.     

Cross-base tax elasticity of capital gains

This paper studies the cross-base tax elasticity of capital gains realizations to labour income taxes when capital gains are taxed at a separate proportional tax rate. Using a longitudinal panel of over 265 000 individuals in Sweden, this paper shows in a regression kink design that labour income taxes affect capital gains realizations in two ways. An increase in the marginal labour income tax rate increases the likelihood of realizing capital gains and the amount of realized capital gains. One implication of this result is that labour income taxes have a lock-out effect but that the magnitude of this effect is smaller than the lock-in effect of the actual capital gains tax.