Knowledge that Transforms

This paper empirically examines belief updating of the perceived probability of arrest and its criminal deterrence effects using two longitudinal data sources. While beliefs about the probability of arrest are positively correlated with local official arrest rates, they are unresponsive to information acquired from random individuals and local neighborhood conditions. Importantly, perceptions respond to changes in an individual's criminal and arrest history. Young males who engage in crime without getting arrested revise their perceived probability of arrest downward, while those who are arrested revise their probability upward. Estimates suggest that beliefs about the probability of arrest significantly deter crime.

This paper investigates the role of seasonal affective disorder (SAD) in the seasonal time-variation of stock market returns. SAD is an extensively documented medical condition whereby the shortness of the days in fall and winter leads to depression for many people. Experimental research in psychology and economics indicates that depression, in turn, causes heightened risk aversion. Building on these links between the length of day, depression, and risk aversion, we provide international evidence that stock market returns vary seasonally with the length of the day, a result we call the SAD effect. Using data from numerous stock exchanges and controlling for well-known market seasonals as well as other environmental factors, stock returns are shown to be significantly related to the amount of daylight through the fall and winter. Patterns at different latitudes and in both hemispheres provide compelling evidence of a link between seasonal depression and seasonal variation in stock returns: Higher latitude markets show more pronounced SAD effects and results in the Southern Hemisphere are six months out of phase, as are the seasons. Overall, the economic magnitude of the SAD effect is large.

We examine two factors that explain air traffic congestion: network benefits due to hubbing and congestion externalities. While both factors impact congestion, we find that the hubbing effect dominates empirically. Hub carriers incur most of the additional travel time from hubbing, primarily because they cluster their flights in short time spans to provide passengers as many potential connections as possible with a minimum of waiting time. Non-hub flights at the same hub airports operate with minimal additional travel time. These results suggest that an optimal congestion tax might have a relatively small impact on flight patterns at hub airports.

January 2003

A central issue in school choice is the design of a student assignment mechanism. Education literature provides guidance for the design of such mechanisms but does not offer specific mechanisms. The flaws in the existing school choice plans result in appeals by unsatisfied parents. We formulate the school choice problem as a mechanism design problem and analyze some of the existing school choice plans including those in Boston, Columbus, Minneapolis, and Seattle. We show that these existing plans have serious shortcomings, and offer two alternative mechanisms each of which may provide a practical solution to some critical school choice issues.

We consider monetary-fiscal interactions when the monetary authority is more conservative than the fiscal. With both policies discretionary, (1) Nash equilibrium yields lower output and higher price than the ideal points of both authorities, (2) of the two leadership possibilities, fiscal leadership is generally better. With fiscal discretion, monetary commitment yields the same outcome as discretionary monetary leadership for all realizations of shocks. But fiscal commitment is not similarly negated by monetary discretion. Second-best outcomes require either joint commitment, or identical targets for the two authorities—output socially optimal and price level appropriately conservative—or complete separation of tasks.

Monetary and Nonmonetary Punishment in the Voluntary Contributions Mechanism by David Masclet, Charles Noussair, Steven Tucker and Marie-Claire Villeval. Published in volume 93, issue 1, pages 366-380 of American Economic Review, March 2003

Economic theory and evidence from a variety of debt markets shed light on current reform proposals concerning emerging market debt. Debt markets, including the U.S. municipal bond market, generally function best when the rights of creditors are protected most effectively.

Because of the Depression’s place in both the popular and academic imagination, and the repeated and justifiable emphasis on output that was not produced, income that was not earned, and expenditure that did not take place, it will seem startling to propose the following hypothesis: the years 1929–1941 were, in the aggregate, the most technologically progressive of any comparable period in U.S. economic history.1 The hypothesis entails two primary claims: that during this period businesses and government contractors implemented or adopted on a more widespread basis a wide range of new technologies and practices, resulting in the highest rate of measured peacetime peak-to-peak multifactor productivity growth in the century, and secondly, that the Depression years produced advances that replenished and expanded the larder of unexploited or only partially exploited techniques, thus providing the basis for much of the labor and multifactor productivity improvement of the 1950’s and 1960’s.

This paper explores the effect of discretion in estate valuation techniques on the effective estate tax burden on different asset classes. For some assets, such as liquid securities, there is relatively little discretion in valuation. For other assets, such as partial interests in closely-held businesses, family limited partnerships, and real assets or collectibles that are traded in thin markets, estate valuations may be more difficult to establish. Estate tax filers may therefore be able to select valuations that reduce the reported value of the estate assets, and therefore the effective estate tax burden. In 1998, estates that invoked the doctrine of "minority discounts" in valuing non-controlling interests in limited partnerships claimed an average discount of 36 percent for these assets, relative to their estimated market value. More than half of all limited partnership assets reported on estate tax returns were valued using this doctrine. This suggests that for a given statutory estate tax rate, the effective estate tax burden may be greater on assets that are easily valued than on difficult-tovalue assets. A comparison of the mix of assets reported on estate tax returns, and the mix the estate tax returns would be predicted to hold, given data from the Survey of Consumer Finances, is consistent with lower relative valuations for difficult-to-value assets.