The rise of the machines: Capital imports and real manufacturing wages in 57 nations

Outward-oriented policy reform has attracted a large number of academics to the study of the trade-labour market nexus. One of these fields has focused on capital intensive (machinery) imports and its effect on manufacturing wages. The skill-enhancing-trade (SET) hypothesis was put forth to explain a potential relationship where an inflow of capital imports results in increased demand for skilled labour and decreased that of unskilled labour, and thus resulted in a rise in skilled wages and a decrease in their unskilled counterparts. This study revisits this hypothesis with a panel from the manufacturing sector of 57 nations. We improve upon previous studies in a number of ways. We add developed nations to the sample and examine capital imports from rich countries as well as the rest of the world. This takes into account the prominence of vertical production networks in international trade. We adhere closely to the neo-classical trade model and employ definitions of skilled and unskilled workers that capture the production process of particular items. Finally, we fit a robust dynamic panel data model that accounts for the endogeneity of the determinants of trade and wages. In this way we test whether the SET hypothesis is generally applicable as opposed to previous studies which use an ad hoc selection of countries and variables. We find that the SET hypothesis is not driving changes in manufacturing wages. Instead, worker productivity and GDP per capita explain these labour market outcomes.     

R&D, Imperfect Competition and Growth with Human Capital Accumulation

This paper studies the long‐run consequences of imperfect competition on growth and the sectoral distribution of skills within an R&D‐based growth model with human capital accumulation. We find that steady‐state growth is driven only by incentives to accumulate skills. In the model imperfect competition has a positive growth effect, while influencing the allocation of human capital to the different economic activities employing this factor input. Contrary to general wisdom, the share of resources invested in R&D turns out not to be monotonically increasing in the product market power and its correlation with the equilibrium output growth rate is not unambiguous.     

EVALUATING RATIONAL PARTISAN BUSINESS CYCLE THEORY: A RESPONSE*

In a recent article published in this journal Steven Sheffrin presented the results of two tests on the so called “Rational Partisan Theory”. Sheffrin concluded that the evidence provides “little support for a strict interpretation of the theory”. This note argues that, although interesting in itself, the tests performed by Sheffrin are not particularly informative about the empirical relevance of the Rational Partisan Theory. Also, this note reconciles Sheffrin's results on OECD economies with the literature, which, in general, has found rather supportive evidence for the Rational Partisan Theory.     

On the determinants of inequality in Bosnia and Herzegovina

We provide empirical evidence on the determinants of income inequality in Bosnia and Herzegovina after the civil war. To do this, we use a an ordered probit approach and take advantage of the first post‐war household survey for the country which sheds some light on the influence of regional differences as well as household characteristics on income quintile determination. With respect to the former, we find large income differences between the two entities in the country, the Federation and Republika Srpska. Such income differences are also noticeable inside entities. On the latter, there are some signs that education, experience, and employment, among others, may help reduce the probability of income decline. Our results are robust to changes of specification as shown by applying a formal sensitivity analysis. JEL classification: O15, O10, I30.     

Price behaviour in the Italian manufacturing industry

This paper sets out to test the hypothesis that the price-cost margins of Italian manufacturing industries are influenced by excess domestic demand and by international prices of manufactured products. Using annual data (1956–1982) a mark-up equation is estimated for each of the twelve industries in which the manufacturing sector has been disaggregated. The ratio of industry price to average total cost is functionally related to the ratio of international price to domestic cost and a measure of excess demand. On the basis of the estimates, which are obtained by Maximum Likelihood techniques, and some specification tests, it is concluded that both factors influence pricing behaviour although their effect is not uniformly significant in every sector.     

English-Language Skills and the Earnings of Self-Employed Immigrants in the United States: A Note

Employing U.S. Census data, this study analyzes how English-language fluency affected the earnings of self-employed immigrant men in the 1980s. Our results suggest that English proficiency became a more important determinant of earnings for foreign-born entrepreneurs in 1990 compared with 1980, even while controlling for factors affecting selection into self-employment.     

Kuhn-Tucker,likelihood ratio and Wald tests for nonlinear models with inequality constraints on the parameters

This paper considers the problem of testing statistical hypothesis in nonlinear regression models with inequality constraints on the parameters. First, the Kuhn-Tucker test procedure is defined. Next, it is shown that the distribution of the Kuhn-Tucker, the likelihood ratio and the Wald test statistics converges to the same mixture of chi-square distributions under the null hypothesis. To illustrate these results two examples are considered: (1) the problem of testing that individual effects are missing in an error component model, and (2) the problem of testing equilibrium for a model of markets in disequilibrium.     

Routing and refueling plans to minimize travel time in alternative-fuel vehicles

A driver who drives an alternative-fuel vehicle (AFV) from an origin point to a destination point needs to consider how to get there (i.e., the routing problem), when to stop, and how and when to refuel (i.e., the refueling plan). In this study, models and algorithms are proposed that optimize a one-way-trip path such that the total travel time from the origin to the destination is minimized. The travel time consists of the setup time, the refueling time and the driving time. The setup time includes waiting for the AFV to be served at a refueling station and the preparation time of charging the machine. We categorized the problems into two types: (1) the refueling plan problem when the routing decision is given and (2) an integrated problem of routing and refueling. Another axis of categorization is when (1) setup time and refueling times are site-independent and (2) parameters are site-dependent. We propose optimal algorithms for site-independent problems and the integrated problem of routing and refueling planning with site-independent parameters. We also conduct experiments and sensitivity analyses for the site-dependent integrated problems of routing and refueling.