Macroeconomic Effects of Asset‐Price Shocks in a Globalized Financial Market

In this paper, I study a model in which shocks to asset prices affect the real sector of the economy through a credit channel. As financial markets become internationally integrated, the economy becomes less vulnerable to domestic asset‐price shocks, but more vulnerable to foreign asset‐price shocks. To the extent that monetary policy stabilization is feasible and desirable, the globalization of financial markets shifts the focus of monetary policy from domestic asset prices to worldwide asset prices.     

INTERGENERATIONAL TRANSMISSION OF ABILITIES AND SELF‐SELECTION OF MEXICAN IMMIGRANTS*

This article presents an intergenerational self‐selection model of migration and education that is capable of explaining the evolution of earnings and education across three generations of immigrants. By structurally estimating the model, it is possible to quantify the sacrifices made by the first generation of Mexican immigrants for the benefits of future generations. In particular, the estimation results suggest that there is a significant one time loss of human capital of immigrants upon migration, that migrants are positively selected from the ability distribution, and that they transmit substantial human capital to their children. Finally, the model is used to evaluate the effects of social policies designed to reduce the “brain drain” from Mexico to the United States.     

On a variational formulation used in credit risk modeling

We consider the credit risk model of Collin-Dufresne and Goldstein (2001). According to this model, the price of a defaultable bond can be efficiently computed using a variational formulation that consists of an integral relation and a Volterra integral equation. In Collin-Dufresne and Goldstein (2001) this integral equation is justified by a probabilistic intuition, but is not proven formally. In this paper we analytically derive the variational formulation used in Collin-Dufresne and Goldstein (2001). This analysis allows to give a correct characterization of the solution of the integral equation. Furthermore the approach proposed in this paper could also be employed for other models of credit risk.     

A signalling model of school grades under different evaluation systems

We examine the role of school grades as a signal of worker productivity under different examination systems in relation to errors that may affect student performance. Firms use school grades as a signal of workers’ effective skills, taking into account that these evaluations are effected by stochastic shocks. We show that more precise evaluation systems, being associated with a higher reactivity of wages to school grades, induce students to provide more effort. Low ability students tend to react less than high ability students. Moreover, individuals with low abilities may prefer less accurate evaluation systems. Nevertheless, when productivity increases, these systems become less convenient and the number of individuals preferring them diminishes. Our analysis highlights an important trade-off between centralised and decentralised evaluation systems. On the one hand, frequent evaluations, typical of decentralised systems, weaken the impact on grades of those errors which influence student performance and, so, reduce signal noise, while, on the other hand, different teachers generally adopt different performance assessment standards, leading to noisier evaluations.     

Financial globalization, financial crises and contagion

Two observations suggest that financial globalization played an important role in the recent financial crisis. First, more than half of the rise in net borrowing of the U.S. non-financial sectors since the mid-1980s has been financed by foreign lending. Second, the collapse of the U.S. housing and mortgage-backed-securities markets had worldwide effects on financial institutions and asset markets. Using an open-economy model where financial intermediaries play a central role, we show that financial integration leads to a sharp rise in net credit in the most financially developed country and to large asset price spillovers of country-specific shocks to bank capital. The impacts of these shocks on asset prices are amplified by bank capital requirements based on mark-to-market.     

Virtual forms for the organization of production: A comparative analysis

In the present competitive environment, excellence in each phase of the productive process and flexibility are critical requirements in every business. Virtual enterprises have been proposed as an inter-organizational model characterized by both strong incentives to suppliers’ performance and high flexibility. Nonetheless, virtual enterprises are not ubiquitous as some suggest they should be. This paper compares virtual enterprises with other models for the organization of production: Markets, vertically integrated firms and networks. We formulate hypotheses that virtual enterprises are suitable for firms producing complex, modular products, with frequent changes in components, but low knowledge specificity. Virtual enterprises are suitable for a group of industries that is limited, but of growing importance.     

Health provider choice and implicit rationing in healthcare: Evidence from Mozambique

An analysis of health provider choice together with a model of implicit rationing in healthcare is presented using Mozambique as a case study. We make use of the Mozambican Household Surveys on Living Conditions 2002/3 and 2008/9. Updated and sometimes contrasting results with respect to similar analyses on older Mozambican data are obtained. In particular, we find that the role of income is more important in 2002/3 and in 2008/9 than it was in 1996/7. In consequence, we further expand the analysis by studying how socioeconomic disparities among other factors influence implicit rationing in healthcare. When using the 2008/9 survey only, moderate evidence that some sort of implicit healthcare rationing is in place is found; that is, some people do not seek care because they foresee they will not be granted quality healthcare access or treatment.