New evidence on taxes and portfolio choice

Identifying the effect of differential taxation on portfolio allocation requires exogenous variation in marginal tax rates. Marginal tax rates vary with income, but income surely affects portfolio choice directly. In systems of individual taxation – like Canada's – couples with the same household income can face different effective tax rates on capital income when labor income is distributed differently within households. Using this source of variation we find portfolio responses to taxation among more affluent households. The estimated effects are statistically significant but economically modest. In a “placebo” test, using data from the U.S. (which has joint taxation), we find no effect of the intra-household distribution of labor income on portfolios.     

Risk taking and taxation: An alternative perspective

The analysis of risk taking and taxation has almost invariably been in a portfolio choice framework. This paper presents the alternative perspective of an occupational choice framework, where risk taking involves the additional element of discrete choice between safe and risky activities. It is shown that the specification of equilibrium must of necessity have a general equilibrium character. In this setting the paper develops rules for government intervention in the market equilibrium, and analyses the effects of taxation on risk taking.     

Tax Evasion, Tax Competition and the Gains From Nondiscrimination: the Case of Interest Taxation in Europe

This paper uses a game–theoretic approach to analyse the taxation of interest income in Europe in the presence of tax evasion. The model allows us to assess the success of various reform proposals. We argue that the tax treatment of nonresidents' interest income plays a crucial role. When decisions on discrimination and on withholding tax rates are made non-cooperatively, the outcome is similar to a prisoners' dilemma. All countries discriminate, but in equilibrium internationally mobile portfolio capital evades taxation successfully. In contrast, if all governments did not discriminate, tax competition leads to less tax evasion.     

OPTIMAL TAX POLICY IN A STOCHASTICALLY GROWING ECONOMY

This paper analyses the optimal taxation of capital in a stochastically growing small open economy in which there is a perfect market for a traded bond. The analysis emphasizes the dependence of the optimal tax structure upon the policy rule guiding the growth of government expenditure, and its impact on the behaviour of private agents. In general three taxes, reflecting three required conditions, are necessary to attain the first-best optimum. The first is to correct for any externality caused by government expenditure; the second is to attain the optimal portfolio share; the third is to ensure that the government budget constraint is met.     

Progressive taxation and the intensity and timing of investment

This paper examines the effect of progressive taxation on a firm's investment intensity and timing decisions using a real options approach. The firm possesses a perpetual option to invest in a project at any instant by incurring an irreversible investment cost at that time. The amount of the irreversible investment cost determines the intensity of investment that augments the value of the project. Tax progression is specified in a particular case of a constant marginal tax rate with an exogenously given tax exemption threshold that makes the average tax rate increase with the tax base. We show that the firm's investment decisions are neutral to tax progression only when the exogenously given tax exemption threshold is sufficiently large. When tax neutrality does not hold, we show that progressive taxation has a perverse effect on investment intensity. Finally, we show that progressive taxation induces the firm to invest earlier as compared to the case under proportional taxation (i.e., in the absence of any tax exemption).     

A note on optimal income taxation,public goods provision and robust mechanism design

This paper extends the model of optimal income taxation due to Mirrlees (Mirrlees, J., 1971. An exploration in the theory of optimum income taxation. Review of Economic Studies 38, 175–208) and includes private information on public goods preferences. A mechanism design approach is used to establish the following result: If policies are required to be robustly implementable in the sense of Bergemann and Morris (Bergemann, D., Morris, S., 2005. Robust mechanism design. Econometrica 73, 1771–1813), then the optimality conditions in the extended model with uncertainty about tax and expenditure policies are the same as in the standard model of optimal income taxation. The paper provides a foundation for a widely-used assumption in public finance, namely that individuals optimize their behavior subject to a predetermined and commonly known tax system.     

Environmental Tax Policy and Long-Run Economic Growth

This paper focuses on two competing effects of environmental taxation on long-run economic growth. One is a negative force, which hampers production; the other is a positive force, which increases the level of environmental quality bequeathed to future generations. The analysis shows that there exists a critical level of the tax that balances one force with the other. If the tax is initially set below (or above) the critical level, then raising the tax rate is beneficial (or harmful) to economic growth.
JEL Classification Numbers: D62, D91, H26, O11, O30, Q20     

Life‐cycle asset accumulation and allocation in Canada

Abstract.  This paper documents the life‐cycle patterns of household portfolios in Canada, and investigates several hypotheses about asset accumulation and allocation. Inferences are drawn from the 1999 Survey of Financial Security, with some comparisons to earlier wealth surveys from 1977 and 1984. I find cross‐sectional evidence for asset decumulation at older ages when annuitized assets like pension wealth are included in the analysis. I also find that the portfolio share of financial assets increases sharply with age, while indicators of risk tolerance appear to decrease. This is consistent with families' desiring more liquid and less risky assets as they age. JEL classification: D31, E21, G11     

Deregulation in an energy market and its impact on R&D for low-carbon energy technology

This paper analyzes the impact of deregulation in an energy market on R&D activities for new energy technology when climate policy is implemented. A model of growth with vertical innovation is modified by including an oligopolistic energy supply sector for demonstrating to what extent deregulation in the energy supply sector will affect R&D activities for low-carbon energy technology, provided that carbon taxation is implemented. The analysis shows that, when the elasticity of substitution between input factors is less than unity, deregulation will drive energy R&D activities and reduce CO₂ accumulation if the energy market is highly concentrated in the beginning.     

Exploitation,skills, and inequality

Abstract

This paper uses a computational framework to analyse the equilibrium dynamics of exploitation and inequality in accumulation economies with heterogeneous labour. A novel index is presented which measures the intensity of exploitation at the individual level and the dynamics of the distribution of exploitation intensity is analysed. Various taxation schemes are analysed which may reduce exploitation or inequalities in income and wealth. It is shown that relatively small taxation rates may have significant cumulative effects on wealth and income inequalities. Further, taxation schemes that eliminate exploitation also reduce disparities in income and wealth but in the presence of heterogeneous skills, do not necessarily eliminate them. The inegalitarian effects of different abilities need to be tackled with a progressive education policy that compensates for unfavourable circumstances.     

Portfolio delegation under short-selling constraints

Summary. In this paper we study delegated portfolio management when the manager’s ability to short-sell is restricted. Contrary to previous results, we show that under moral hazard, linear performance-adjusted contracts do provide portfolio managers with incentives to gather information. We find that the risk-averse manager’s effort is an increasing function of her share in the portfolio’s return. This result affects the risk-averse investor’s choice of contracts. Unlike previous results, the purely risk-sharing contract is now shown to be suboptimal. Using numerical methods we show that under the optimal linear contract, the manager’s share in the portfolio return is higher than what it is under a purely risk sharing contract. Additionally, this deviation is shown to be: (i) increasing in the manager’s risk aversion and (ii) larger for tighter short-selling restrictions. As the constraint is relaxed the deviation converges to zero.Received: 25 July 2002, Revised: 12 December 2004, JEL Classification Numbers: D81, D82, J33.Juan-Pedro Gómez: Correspondence toAn earlier version of the paper was circulated under the title “Providing Managerial Incentives: Do Benchmarks Matter?” We are grateful to an anonymous referee whose comments helped to improve the paper. We also thank comments by Viral Acharya, Alexei Goriaev, Ernst Maug, Kristian Rydqvist, Neil Stoughton, Rangarajan Sundaram, Fernando Zapatero and seminar participants at the 1999 SED meetings in Sardinia, the 1999 Workshop in Mutual Fund Performance at EIASM, Brussels, the 2000 EFA meetings in London, the Bank of Norway, the Stockholm Schools of Economics, the Norwegian School of Management and the 2001 WFA meetings in Tucson. Sharma gratefully acknowledges financial support from the Asociacion Mexicana de Cultura.     

Green taxes and uncertain timing of technological change

This paper concerns the role of environmental taxation in a model with endogenous technological change, where the latter implies that natural inputs become more productive. The timing of technological change is, in turn, uncertain and the likelihood of discovering the new technology is related to the amount of resources spent on R&D. The analysis is based on a dynamic general equilibrium model. One purpose of the paper is to design a policy so as to internalize the external effects arising from pollution and R&D. Another is to develop cost benefit rules for green tax reforms, when the initial equilibrium is suboptimal.     

Redistribution with Unobservable Bequests: A Case for Taxing Capital Income

This paper addresses the question of the optimal taxation of labour and interest income in an overlapping generations model with two unobservable characteristics, ability and inheritance. We assume realistically that saving can only be taxed anonymously, whereas the tax on labour earnings can be individualized and made non-linear. In such a setting, we show that a withholding tax on interest income along with a non-linear tax on labour income is desirable. The role of interest income taxation is to indirectly tax inherited wealth.
JEL Classification D 63, H 2     

Optimal linear income taxation in the presence of emigration

This paper examines optimal linear income taxation when individuals are able to escape taxation by migrating. A model is presented in which closing the economy to migration must raise the optimal marginal tax. However, this result may be reversed under an alternative definition of a closed economy.     

The Saving Behaviour of a Two-person Household

The facts that wives are typically younger than their husbands and that women typically live longer than men imply that wives may have more incentive to save for old age than do husbands. A theoretical model of the determination of household saving and portfolio choice is introduced which takes into account differences in preferences for saving. The most important result is that the level and the composition (portfolio) of saving and the time path of consumption are dependent on the distribution of income within the household.
JEL classification: D 1; D 7     

A macroeconometric analysis of the effects of taxation on financing and real investment in equipment in Canada

This paper analyses the impact of taxation on corporate financing and corporate investment in machinery and equipment in Canada. A coherent macroeconometric model of the firm's real and financial decision process is theoretically developed and empirically tested on Canadian data. Estimates of the impact of taxation in general and of the 1987 Canadian government's White Paper in particular, are analysed. The estimates suggest that income taxation has a negative but relatively small impact on equipment investment in Canada, and that models that ignore the link between the real and financial decisions overestimate the impact of taxation on real investment. With respect to tax reform, the White Paper reduces the incentive to save and invest in equity capital, and is expected to decrease real capital investment in the long run.     

Evolutionary stable stock markets

Summary. This paper shows that a stock market is evolutionary stable if and only if stocks are evaluated by expected relative dividends. Any other market can be invaded in the sense that there is a portfolio rule that, when introduced on the market with arbitrarily small initial wealth, increases its market share at the incumbents expense. This mutant portfolio rule changes the asset valuation in the course of time. The stochastic wealth dynamics in our evolutionary stock market model is formulated as a random dynamical system. Applying this theory, necessary and sufficient conditions are derived for the evolutionary stability of portfolio rules when relative dividend payoffs follow a stationary Markov process. These local stability conditions lead to a unique evolutionary stable portfolio rule according to which assets are evaluated by expected relative dividends (with respect to the objective probabilities).Received: 7 October 2003, Revised: 18 January 2005, JEL Classification Numbers: G11, D52, D81. Correspondence to: Klaus Reiner Schenk-HoppéWe are grateful to Jarrod Wilcox and William Ziemba for valuable comments. Financial support by the national center of competence in research Financial Valuation and Risk Management is gratefully acknowledged. The national centers in research are managed by the Swiss National Science Foundation on behalf of the federal authorities.     

Migration and optimal income taxes

The issue addressed in this paper is the optimal taxation of incomes earned in the home economy, and of incomes earned abroad, when people can migrate. As a preliminary, the optimal taxation of home incomes when there is migration and no taxation of foreign incomes, is discussed. Then in a more general setting, we deal with optimal taxation of different kinds of labour when another kind of labour is not taxable, and show how this bears on the taxation of foreign incomes. The last sections of the paper analyse a simple model in which people choose between taxable labour at home, taxable labour abroad, and untaxable labour. A condition is found implying that the optimal tax on foreign income is higher than on the home income of a person of equal utility.     

The buffet syndrome, midday menu and terry towels

In a recent article, Bazin et al. (Bazin, D., Ballet, J., Touahri, D., 2004. Environmental responsibility versus taxation. Ecological Economics 49 (2), 129–134.) argue that taxation produces a crowding out effect on responsible behaviours. This crowding out effect is linked to the buffet syndrome, e.g. wherein an environmental tax is like a food buffet in that when you pay you could consume as much as you want. This article means to offer a perspective on this syndrome. It shows that this syndrome comes into play only in certain circumstances and that explicit policies may avoid it. In particular, the development of clean goods and technologies may avoid the buffet syndrome.     

Choosing Between Internal and Non-internal R&D Activities: Some Technological and Economic Factors

This paper evaluates some of the technological and economic factors that underlie the choice between in-house R&D, R&D alliances and outsourcing. We recount the reasons for the growth in non-internal activities, and explain why these are not as prevalent for R&D as other value-adding activities, and highlight that outsourcing is most often undertaken where multiple, substitutable sources are available. We then develop two frameworks. First, a static framework is developed, which evaluates the choice of mode based on a firm's distribution of competencies, and their strategic importance. Second, a dynamic framework is developed that demonstrates how the static framework differs depending on whether the firm is engaged in pre-paradigmatic, paradigmatic or post-paradigmatic sectors. We also consider the effect of new technologies being introduced to a firm's portfolio of competencies