In spatial models of electoral competition, candidate quality is typically modeled as valence, a measure of general appeal assumed to be constant across voters. This paper introduces and formally models an alternative conception of candidate quality according to which candidates differ in their...

Generalized linear spatial models (GLSM) are used here to study spatial characters of zoonotic cutaneous leishmaniasis (ZCL) in Tunisia. The response variable stands for the number of affected by district during the period 2001-2002. The model covariates are: climates (temperature and rainfall),...

Against the backdrop of an ongoing debate in most countries about the geographic (mal-)distribution of physician practices, we develop a theoretical and empirical framework to analyze how physician supply at regional level depends on demographic (population size, age struc- ture, fertility and...

This paper considers whether generic promotion lowers the differentiation among competing brands as claimed in the 1997 Supreme Court case (Wileman et al. v. Glickman). Commodity promotion is modeled as a multi-stage game where products are vertically differentiated. Analytical results show that...