Knowledge that Transforms

This paper analyzes the regulatory factors shaping environmental performance at individual polluting facilities. In particular, it examines the influence of actual government interventions, namely, inspections and enforcement actions performed at specific facilities. This influence represents specific deterrence. This paper also examines general deterrence, that is, the threat of receiving an intervention. As important, it controls for differences in certain regulatory features of facility-specific pollution control permits. Unlike previous attempts to examine regulatory factors, this analysis uses panel data techniques to capture the heterogeneity across individual facilities, while exploring the dynamics of each facility; the analysis also captures heterogeneity across individual time periods.

We characterize asset return linkages during periods of stress by an extremal dependence measure. Contrary to correlation analysis, this nonparametric measure is not predisposed toward the normal distribution and can allow for nonlinear relationships. Our estimates for the G-5 countries suggest that simultaneous crashes between stock markets are much more likely than between bond markets. However, for the assessment of financial system stability the widely disregarded cross-asset perspective is particularly important. For example, our data show that stock-bond contagion is approximately as frequent as flight to quality from stocks into bonds. Extreme cross-border linkages are surprisingly similar to national linkages, illustrating a potential downside to international financial integration.

Wage decompositions are often used to decompose wage differentials of two demographic groups into differences in characteristics and differences in returns to those characteristics. The latter part is used as an estimate of the degree of discrimination. A problem with this approach is that the contributions of individual dummy variables to the wage decomposition are not identified. This note proposes a simple solution to the identification problem. The solution is illustrated with an empirical application to Spanish labor market data.

The volatility of U.S. real GDP growth since 1984 has been markedlylowerthanoverthepreviousquartercentury.Weutilizefrequency-domain and VAR methods to distinguish among competing explanations for this reduction: improvements in monetary policy, better business practices, and a fortuitous reduction in exogenous disturbances. We find that reduced innovation variances account for much of the decline in aggregate output volatility, suggesting that good luck is the most likely explanation. Good practices and good policy appear to have played a more important role in explaining the post-1984 decline in the volatility of consumer price inflation.

International audience

Research on the effect of language skills on earnings is complicated by the endogeneity of language skills. This study exploits the phenomenon that younger children learn languages more easily than older children to construct an instrumental variable for language proficiency. We find a significant positive effect of English proficiency on wages among adults who immigrated to the United States as children. Much of this effect appears to be mediated through education. Differences between non-English-speaking origin countries and English-speaking ones that might make immigrants from the latter a poor control group for nonlanguage age-at-arrival effects do not appear to drive these findings.

This paper investigates the role of money in markets in which producers haveprivate information about the quality of the goods they supply. When the fractionof high-quality producers in the economy is given, money promotes the productionof high-quality goods, which improves the quality mix and welfare unambiguously.When this fraction is endogenous, however, we find that money can decreasewelfare relative to the barter equilibrium. The origin of this inefficiency is thatmoney provides consumption insurance to low-quality producers, whichcan result in a higher fraction of low-quality producers in the monetaryequilibrium. Finally, we find that most often agents acquire more costlyinformation in the monetary equilibrium than in the barter equilibrium.Consequently, money is welfare-enhancing because it promotes usefulproduction and exchange, but not because it saves information costs. Copyright The Review of Economic Studies Limited, 2004.

have provided us with a wealth of information about the newest products of U.S. Ph.D. programs. Among the notable facts are the continuing decline in the share of U.S. natives among these new graduates, their continued success at landing academic and other professional jobs, and their high level of professional fulfillment, in terms of both job satisfaction and outcomes measuring up to expectations. There are also a variety of intriguing results. For example, (from their table 5) students completing the top Ph.D. programs were younger, less likely to be married, and more likely to be foreign than those in the overall sample. Perhaps most disturbing, (from their table 6) median starting full-time academic salaries were lowest in public economics, a result that cannot be accounted for in salary regressions with other covariates. This clearly is an inversion of the appropriate ranking. In my comments, I will focus on two selected aspects of Ph.D. programs and the Ph.D. job market.

The 3 July 2002 issue of the Chronicle of Higher Education described the matter we are discussing today in these words: "Taken together. African-Americans and persons of Hispanic origin represent only 8 percent of full-time faculty nation-wide, and while 5 percent are African-American, half of them work at historically black institutions. The proportion of black faculty members at white institutions is 2.3 percent, virtually the same as it was 20 years ago." We are privileged to have the opportunity to explore this issue from two different perspectives. The first contends that unless major changes occur, the number of minority students interested in and prepared for faculty positions will remain dreadfully insufficient and that, furthermore, affirmative action has been a culprit in this process and leads many of these students into higher educational environments in which they do not perform well enough to even seriously consider or be considered for careers in academe. The other position says that, although the supply of minority faculty candidates is admittedly small, the relatively low level of commitment from higher educational institutions to recruit, hire, and promote minority candidates and the salary disparity between academe and industry lead to a problem of demand that must be appreciated and addressed. Furthermore, it argues, affirmative action has been beneficial in increasing minority faculty presence

In Burnside and Dollar (2000) we used standard regression techniques from the growth literature to measure the effect of foreign aid on growth. The main finding in our paper was that the effect of foreign aid on growth depended on the macroeconomic policies of recipient countries. In this issue, William Easterly et al. (2004), challenge the robustness of our result to new data. Before commenting on their findings it is useful to review the basis of our original findings. Our paper focused on three versions of a panel growth regression, estimated using data for 51 countries, and six four-year periods, from 1970 to 1993. These regressions may be summarized as: