Howard J. Wall

Ethnic Networks and US Exports

This paper provides new estimates of the effects of ethnic networks on US exports. In line with recent research, our dataset is a panel of exports from US states to 29 foreign countries. Our analysis departs from the literature in two ways, both of which show that previous estimates of the ethnic-network elasticity of trade are sensitive to the restrictions imposed on the estimated models. Our first departure is to control for unobserved heterogeneity with properly specified fixed effects, which we can do because our dataset contains a time dimension absent from previous studies. Our second departure is to remove the restriction that the network effect is the same for all ethnicities. We find that ethnic-network effects are much larger than has been estimated previously, although they are important only for a subset of countries.

The British Beveridge curve: A tale of ten regions

This paper uses county-level data to estimate the timing and magnitude of shifts in aggregate and regional British Beveridge curves. We find that these shifts coincide with the business cycle rather than with hysteresis effects or with changes in regional mismatch. This implies that the Beveridge curve is a flawed device for separating the effects of structural changes from those of the business cycle.

Gravity model specification and the effects of the Canada-U.S. border

There is a well-established literature finding that the Canada-U.S. border has a large dampening effect on trade, is asymmetric, and differs across provinces. In this paper, I demonstrate that the standard gravity model used to obtain these results provides biased estimates of the volume of trade. I attribute this to heterogeneity bias and reestimate the effects of the border using a gravity model that allows for heterogeneous gravity equations. Doing so does not alter the general results of existing studies, although it does yield a border effect that is 40 percent larger, reverses the borders asymmetry, and indicates very different provincial effects.

Entrepreneurship and the policy environment

This paper uses a spatial panel approach to examine the effect of the government-policy environment on the level of entrepreneurship. Specifically, we investigate whether marginal income tax rates and bankruptcy exemptions influence rates of entrepreneurship. Whereas previous work in the literature finds that both policies are positively related to entrepreneurship, we find non-monotonic relationships: a U-shaped relationship between marginal tax rates and entrepreneurship and an S-shaped relationship between bankruptcy exemptions and entrepreneurship.

NAFTA and the Geography of North American Trade

Debates over the desirability a preferential trading area (PTA) begin with the supposition that it will have two effects on the volume of trade: it will increase trade between PTA members, and decrease trade between members and non-members. This paper demonstrates, however, that at the regional level the effects of NAFTA have been much more complicated than what is normally supposed. Specifically, I find that NAFTA has meant (i) less trade between Eastern Canada and the United States and Mexico, (ii) more trade between Central Canada and the United States and Mexico, and (iii) more trade between Western Canada and Mexico, but no change in the volume of trade between Western Canada and the United States. I also find that NAFTA has decreased trade between Canadian regions and both Europe and Asia, while increasing Mexicos trade with Asia.

States and the Business Cycle

We model the US business cycle using a dynamic factor model that identifies common factors underlying fluctuations in state-level income and employment growth. We find three such common factors, each of which is associated with a set of factor loadings that indicate the extent to which each states economy is related to the national business cycle. According to the factor loadings, there is a great deal of heterogeneity in the nature of the links between state and national economies. In addition to exhibiting geographic patterns, the closeness of state economies to the national business cycle is related not only to differences in industry mix but also to non-industry variables such as agglomeration and neighbor effects. Finally, we find that the common factors tend to explain large proportions of the total variability in state-level business cycles, although, again, there is a great deal of cross-state heterogeneity.

Regional VARs and the channels of monetary policy

We find that the magnitudes of the regional effects of monetary policy were considerably dampened during the Volcker-Greenspan era. Further, regional differences in the depths of monetary-policy-induced recessions are related to the concentration of the banking sector, whereas differences in the total cost of these recessions are related to industry mix.

The Effects of Recessions across Demographic Groups

The burdens of a recession are not spread evenly across demographic groups. The public and media, for example, noticed that, from the start of the current recession in December 2007 through June 2009, men accounted for more than three quarters of net job losses. Other differences have garnered less attention, but are just as interesting. During the same period, the employment of single people fell at more than twice the rate that it did for married people, while black employment fell at one-and-a-half times the rate that white employment did. To have a more complete understanding about what recessions mean for people, this paper examines the different effects of this and previous recessions on employment experiences across a range of demographic categories: sex, marital status, race, age, and education level.

Reconsidering the Trade-Creating Effects of a Currency Union

This paper reconsiders recent empirical evidence found by Andrew Rose that countries adopting a common currency will triple their bilateral trade. The authors find that this large estimated effect is due to estimation bias arising from missing and/or misspecified time-variant factors rather than to the adoption of a common currency. The results of this study, obtained with a general specification of time-variant factors, indicate that a common currency actually leads to a small reduction in trade over a 5-year period, although this result is not statistically different from zero. The authors also find that over 10- and 20-year periods, trade volumes are more than halved by the adoption of a common currency.

The Economic Performance of Cities: A Markov-Switching Approach

This paper examines the determinants of employment growth in metro areas. To obtain growth rates, we use a Markov-switching model that separates a citys growth path into two distinct phases (high and low), each with its own growth rate. The simple average growth rate over some period is, therefore, the weighted average of the high-phase and low-phase growth rates, with the weight being the frequency of the two phases. We estimate the effects of a variety of factors separately for the high-phase and low-phase growth rates. Growth in the high phase is related to both human capital and industry mix, while growth in the low phase is related to industry mix only, specifically, the relative importance of manufacturing. Overall, our results strongly reject the notion that city-level characteristics influence employment growth equally across the phases of the business cycle.