Knowledge that Transforms

This paper provides new evidence on the predictive power of dividend yields for U.S. aggregate stock returns.Following Miller and Modigliani, we construct a measure of the dividend yield that includes all cash flows to shareholders.We show that this alternative cash-flow yield has strong and stable predictive power for returns, and appears robust to a battery of tests that have been proposed in recent critiques of the predictability literature.

From 1940 to 1990, a 10% increase in a metropolitan area's concentration of college-educated residents was associated with a 0.8% increase in subsequent employment growth. Instrumental variables estimates support a causal relationship between college graduates and employment growth, but show no evidence of an effect of high school graduates. Using data on growth in wages, rents, and house values, I calibrate a neoclassical city growth model and find that roughly 60% of the employment growth effect of college graduates is due to enhanced productivity growth, the rest being caused by growth in the quality of life. This finding contrasts with the common argument that human capital generates employment growth in urban areas solely through changes in productivity.

This paper presents a monopolistic competition model of trade and multinational production that incorporates asymmetric trade barriers and international differences in production costs. The model predicts the functional form for the dependence of U.S. exports and multinational production on tariffs, distance, and production costs. To deal with simultaneity, we estimate the nonlinear equations of U.S. exports and multinational production simultaneously. In the estimation, we also include country fixed effects and allow for endogenous location choice by firms. The estimation yields reasonable estimates of the structural parameters, including the elasticity of substitution. Based on the estimates, we then simulate the effects of trade liberalization. We find that the elimination of tariffs worldwide would increase U.S. exports by 3.0% and U.S. multinational production by 21.7%. This large expansion of U.S. overseas production mainly results from an expected increase in the number of U.S. foreign affiliates in response to tariff reductions.

This paper compares technologies across space and time on the basis of factual and counterfactual substitution elasticities and argues that differences in estimated substitution elasticities should be decomposed into two counterfactual components. While the first component is designed to indicate how the ease of substitution is altered by varied economic circumstances, the second addresses the question of how technologies would compare under genuinely comparable situations. This argument is illustrated by the example of energy-price elasticities of capital before and after the oil crisis of the early 1970s.

Previous experimental research has shown that people's decisions can be influenced by options they have encountered in the past. This paper uses PSID data to study this phenomenon in the field, by observing how long people commute after moving between cities. It is found, as predicted, that (i) people choose longer commutes in a city they have just moved to, the longer the average commute was in the city they came from and (ii) when they move again within the new city, they revise their commute length, countering the impact their origin city had on their initial decision.

Many studies find that parental resources importantly determine children's human capital, schooling returns, and earnings. The collective household approach suggests that, in addition, parental resources of marital partners may importantly affect resource distributions within marriage. This paper presents empirical results consistent with this framework. They suggest that parental wealth continues to play roles in augmenting welfare of children into adulthood beyond provision of human capital in early life-cycle stages or direct financial aid during adulthood, and that actual transfers from parents to adult children do not fully measure influences of parental wealth on behaviors and welfare of adult children.

We study the effects of a change in financial aid policy introduced by a Northeastern university in 1998. Prior to that time, the university s financial aid packages for low income students consisted of grants, loans, and campus jobs. After the change, the entire loan portion of the package for low-income students was replaced with grants. We find the program increased the likelihood of matriculation by low-income students by about 3 percentage points, although the effect is not statistically significant. The effect among low-income minority students was about twice that size and statistically significant at the 10 percent level.

In popular discussion much has been made recently of the susceptibility of government policies to lobbying by foreigners. The general presumption has also been that such interactions have a deleterious effect on the home economy. However, it can be argued that, in a trade policy context, bending policy in a direction that would suit foreigners may not in fact be harmful: If the policy outcome absent any lobbying by foreigners is characterized by welfare-reducing trade barriers, lobbying by foreigners may result in reductions in such barriers and raise consumer surplus (and possibly improve welfare). Using a new data set on foreign political activity in the US, this paper investigates the relationship between trade protection and lobbying activity empirically. The approach taken in this paper is primarily a structural one. To model the role of foreign and domestic lobbies in determining trade policy, we develop first a theoretical framework building on the wellknown work of Our analysis of the data suggests that foreign lobbying activity has significant impact on trade policy -and in the predicted direction: Tariffs and non-tariff barriers (NTBs) are both found to be negatively related with foreign lobbying activity. We consider also extended specifications in which we include a large number of additional explanatory variables that have been suggested in the literature as determinants of trade policy (but that emerge from outside of the theoretical structure described above) and confirm the robustness of our findings in this setting.