Knowledge that Transforms

The first two main sections survey the roles of transnational networks in alleviating problems of contract enforcement and providing information about trading opportunities, respectively. The next section covers how domestic networks influence international trade through their impact on domestic market structure. Two overarching questions unify these sections: how do networks affect efficiency, and will networks grow or shrink in importance for international trade over time. The last main sections develop research agendas for two less studied areas: the role of intermediaries who can connect foreign agents to domestic networks and the ability of transnational production networks to facilitate technology transfer.

This paper summarizes and tries to reconcile evidence from the microeconometric and empirical macro growth literatures on the effect of schooling on income and GDP growth. Much microeconometric evidence suggests that education is an important causal determinant of income for individuals within countries. At a national level, however, recent studies have found that increases in educational attainment are unrelated to economic growth. This discrepancy appears to be a result of the high rate of measurement error in first-differenced cross-country education data. After accounting for measurement error, the effect of changes in educational attainment on income growth in cross-country data is at least as great as microeconometric estimates of the rate of return to years of schooling. Another finding of the macro growth literature—that economic growth depends positively on the initial stock of human capital—is not robust when the assumption of a constant-coefficient model is relaxed.

According to the permanent income hypothesis with quadratic preferences, households save for a rainy day the transitory component of income innovations and consume entirely the permanent one. The model also rules out precautionary saving. Typically, income shock components are not separately observable, and information on the conditional variance of income is hard to come by. We show how to combine income realizations with subjective expectations to identify separately the transitory and the permanent shock to income and to obtain a measure of idiosyncratic uncertainty, thus providing a powerful test of the theory in short panels. The empirical analysis is performed on a sample of Italian households drawn from the 1989–1991 Survey of Household Income and Wealth.

Because data are collected for only fatal crashes, it is difficult to accurately measure seat belt and air bag effectiveness. The use of safety devices influences survival rates which in turn determine whether a crash is included in the sample, leading to sample selection bias. We propose a simple solution to the selection problem: limiting the sample to crashes in which someone in a different vehicle dies. Empirically, we find seat belts more effective and air bags to be less effective than previously found. The cost per life saved through seat belts is approximately $30,000, compared to $1.8 million for air bags.

Critics argue that the estate tax prevents the owners of family businesses from passing their enterprises to heirs because it is difficult to pay estate taxes without liquidating the business. Why don't owners purchase enough life insurance to meet their estate tax liabilities? We examine whether and how people use life insurance to deal with the estate tax. We find that, ceteris paribus, business owners purchase more life insurance than do other individuals. However, on the margin, their insurance purchases are less responsive to estate tax considerations, and they are less likely to have the wherewithal to meet estate tax liabilities out of liquid assets plus insurance.

Following monetary union with west Germany in June 1990, the median real monthly consumption wage of east German workers aged 18-54 rose by 83 in six years. The median real product wage rose by 112. On the other hand, the employment rate fell from 89 to 73 for this age group. The overall employment level, in uenced by early retirements, fell by about a third between 1989 and 1992, when it stabilized. Although east Germany's employment fall is not striking by European transition economy standards, it is an outlier in terms of wage growth, the least dissimilar country being Poland, where real product wages rose about 25 in the years following transition. 1 The east German wage rises, coming on top of the wage rise implicit in the decision to unify the currency at a one for one exchange rate, were pushed through by the powerful union structure

We estimate the impact of employer-provided retiree health insurance (EPRHI) on the labor force transitions of men aged 51 to 62.Data from the Health and Retirement Survey provide detailed and accurate measures of retiree health insurance. Availability of EPRHI increases the rate of exit from employment by two percentage points per year if the individual shares the cost of the insurance with the firm, and by six percentage points if the firm pays the entire cost. The impact of cost-shared EPRHI on the annual rate of labor force exit increases with age, reaching 7.5 percentage points by age 61.

The theory of intertemporal choice predicts that the cross-sectional variance of the marginal utility of consumption is equal to its own lag plus a constant and a random component. Using general preference specifications and some assumptions about the nature of the random component, we provide an explicit test of this hypothesis. Our approach circumvents the necessity to identify a pure age profile of the cross-sectional variance of consumption and yields a well-specified statistical test. This test is applied to data from the United States, the United Kingdom, and Italy. The results are remarkably consistent with the restrictions implied by the theory of intertemporal consumption choices.

Empirical studies of forecasts often fail to reconcile the rational expectations hypothesis with a minimum mean square error objective function. Recent studies, however, have argued that observed bias may be rational in certain advising games, or for objective functions that include publicity or forecasting reputation as additional arguments. This paper analyzes multistep forecasting behavior for individuals forecasting bond yields in the Blue Chip Financial Survey over the 1987–1996 period and uncovers statistically significant evidence supportive of Ehrbeck and Waldmann's rational stubbornness. I find that forecasters rationally place too much weight on their previous forecasts in an attempt to mimic the behavior of more able forecasters (perhaps attempting to fool their clients). Jointly, I also find that this pattern of under-revision is positively correlated with mean square forecasting errors. Rational stubbornness is sensitive to the forecasting horizon as well as bond maturity.