Social Preferences,Sorting, and Competition*

In this paper, I investigate how an increase in competition for workers influences the impact of social preferences on labor‐market outcomes. By sorting themselves into firms with homogeneous work forces, workers can ensure that they suffer less from social comparisons. Competition promotes choice and thus facilitates sorting. However, competition also boosts rent differences in the labor market, because firms cannot curb internal inequity among its employees without losing workers to competitors. To reduce their exposure to social comparisons, workers might engage in inefficient sorting into unemployment. Consequently, social preferences can have strong effects (i.e., unemployment) in a competitive labor market, whereas they only have a slight impact on labor‐market outcomes in a monopsony.     

Price Volatility and Risk Exposure: On the Interaction of Quota and Product Markets

We consider an industry with firms that produce a final good emitting pollution to different degree as a side effect. Pollution is regulated by a tradable quota system where some quotas may have been allocated at the outset, i.e. before the quota market is opened. We study how volatility in quota price affects firm behaviour, taking into account the impact of quota price on final-good price. The impact on the individual firm differs depending on how polluting it is??whether it is ??clean?? or ??dirty????and whether it has been allocated quotas at the outset. In the absence of long-term or forward contracting, a grandfathering regime??where clean firms are allocated no quotas and dirty firms are allocated quotas for a part of their emissions??minimizes the impact on firm behavior relative to a risk-neutral benchmark.With forward contracts and in the absence of wealth effects initial quota allocation has no effect on firm behaviour. Allowing for abatement does not change the qualitative nature of our results.     

Decision parameters in global R&D management

This paper addresses the question of which variables have what kind of impact on the decision to locate new R&D facilities in countries different from the home country of a corporation. In the first section of the paper we demonstrate the complexity of this question by referring to empirical research, managerial statements and literature. We then develop a conceptual model for the location decision of international R&D activities. This is based on Porter's (1990) framework of the factors constituting the competitive advantage of nations. In the final section of this paper we show how such a model helps us to understand and also to explain a number of management issues related to global R&D activities.     

Gene-environment interactions and the complexity of human genetic diseases

In the assessment of mortality and morbidity risk, the ability of family history and genetic test results to predict the age of occurrence, severity, and long-term prognosis of 'genetic' diseases is important. An increasing number of gene-gene and gene-environment interactions have been demonstrated in a number of monogenic Mendelian diseases. These interactions can significantly modify the clinical presentation (disease phenotype) of diseases previously regarded purely as 'genetic.' As a result, 'genetic' diseases can be positioned in a continuum between classic Mendelian and complex disease where the extremes, pure genetic or solely non-genetic, do not exist. The position of any given disease in this continuum is defined by three components: the major gene(s) contributing to the phenotype, the variability added by modifier genes and the significance of environmental factors influencing the phenotype. As the predictive value of genetic test results can be significantly influenced by additional genetic and environmental risk factors, a better understanding of these factors may influence the quantification of mortality and morbidity risk.     

Development strategy for rural areas

In September 1973, the President of the World Bank, Robert S. McNamara, made a challenging address to the Governors of the Central Banks of the member states of the international Monetary Fund. The main subject in his speech was the problem of poverty particularly in rural areas of developing countries, and the design for a strategy for its abolition.     

Food in sub-Saharan Africa : Trends and policy challenges for the 1990s

The food situation in Africa can be expected to become increasingly serious as the end of the century approaches. The gap between domestic supply and food needs in rapidly widening. Yield-increasing technology becomes essential in view of land scarcity in high-potential areas and sustainability problems in marginal zones. The concern of governments for food self-sufficiency, however, must not divert attention from the primary objective of household food security, which is essentially a question of households' real income. Accelerated rural growth and improved rural health and sanitation services accessible to the poor are central elements for household food security improvement.