Is There a Social Security Tax Wedge? A Beveridgean pension scheme invariably introduces a wedge between the wage rate and the marginal take-home pay. A Bismarckian one can do so only if it is not actuarially fair, or in the presence of credit rationing. Interestingly, if the two possible sources of distortion are present at the same time, they will tend to offset each other. The distortion may...

This paper adopts a stochastic overlapping generations framework to analyze the allocation of aggregate financial risks under different social security systems and a majority voting rule. We study whether there will be switches between pay-as-you-go (PAYG) and fully funded (FF) systems in such an economy. We show that in case of a negative aggregate shock, lowincome young individuals will form ...

We provide a lifecycle framework for comparing the insurance value of disability benefits and the incentive cost. We estimate the risks that individuals face and the parameters governing the disability insurance program using longitudinal US data on consumption, health, disability insurance, and wages. We characterize the economic effects of disability insurance and study how policy reforms imp...

This paper analyses the e¤ects of reducing unfunded social security in a closed economy that consists of a service sector and a commodity sector. It is shown that if old agents mainly demand labour intensive services, a modest decrease of the pay-as-you-go pension scheme still raises long-run utility as long as the economy is dynamically e¢cient. However, entirely privatising the social securit...

Active Unemployment Insurance The paper argues that a comprehensive activation strategy is called for – in both unemployment and disability insurance – to minimize the conflict between income insurance and work incentives and to prevent the economic crisis from causing a long-lasting decline in labor force participation. A review of recent empirical evidence, particularly from the Scandinavian ...

This paper analyses the general equilibrium implications of reforming pay-as-you-go pension systems in an economy with heterogeneous agents, human capital investment and capital-skill complementarity. It shows that increasing funding delivers in the long run higher physical and human capital and therefore higher output, but also higher wage and income inequality. The latter affects preferences ...

Income Inequality, Mobility, and the Welfare State: A Political Economy Model In this paper, we set up a three-period stochastic overlapping generations model to analyze the implications of income inequality and mobility for demand for redistribution and social insurance. We model the size of two different public programs under the welfare state. We investigate bidimensional voting on the tax r...

The paper presents a model where public pensions are determined by majority voting. Voters differ by age and income. Moreover, life expectancy increases with income. Depending on the strength of the link between contributions and benefits, and the relationship between income and life expectancy, individually optimal tax rates may increase or decrease with income. If they decrease, high tax rate...

Bacterial H antigens are specified by flagellin molecules, which constitute the flagellar filament. Escherichia coli 781-55 and E2987-73 are the type strains for H44 and H55 antigens, respectively. Unlike E. coli K-12, they possess two flagellin genes, fliC and fllA, on their chromosomes. However, they are monophasic, expressing exclusively the fllA genes, which specify the type antigens. In th...