Security markets between generations are incomplete in the laissez-faire economy since risk sharing agreements cannot be made with the unborn. But suppose that generations could trade if, for example, a representative of the unborn negotiated on their behalf today. What would the trades look...

A presentation of a large-scale, dynamic simulation model for comparing the equity, efficiency, and macroeconomic effects of five alternatives to the current U.S. federal income tax: a proportional income tax, a proportional consumption tax, a flat tax, a flat tax with transition relief, and a...

A new explanation is offered for the thin private market for individual annuities in the United States. Individuals face a risk of health shocks which simultaneously cause large uninsured expenses and shorten the life expectancy. The value of a life annuity then decreases at the same time as the...

This paper uses a new large-scale dynamic simulation model to compare the equity, efficiency, and macroeconomic effects of five alternatives to the current U.S. federal income tax. These reforms are a proportional income tax, a proportional consumption tax, a flat tax, a flat tax with transition...

A look at how some basic tax reform proposals stack up against four, sometimes competing, requirements laid out by President Clinton in a December 1997 speech: Is the proposal fiscally responsible? Will it be good for the economy? Will it lead to a simpler tax system? And finally, is it fair to...

Examines a broad range of reduced-form and intertemporal models in which each model is calibrated to generate the same initial economy, which allows the authors to focus on model features without concern that initial differences in calibration are determined.

Baby boomers are now retiring in large numbers, and most do not have enough assets of their own to finance retirement. Social insurance programs help baby boomers afford retirement, but these programs are substantially underfunded. Reforming these institutions earlier will produce fewer...

The conventional wisdom dating back to Yaari (1965) is that households without a bequest motive should fully annuitize their investments. Numerous market frictions do not break this sharp result. We modify the Yaari framework by allowing a household's mortality risk itself to be stochastic....

Public attention has focused on how the launch of the national health exchanges could impact the types of risks who initially enroll and thereby affect future premiums and enrollment. We introduce simple dynamics into a standard model of insurance under adverse selection to show that such...

While the Sharpe ratio is still the dominant measure for ranking risky assets, a substantial effort has been made over the past three decades to find a way to account for non-Normally distributed risks. This paper derives a generalized ranking measure which, under a regularity condition,...