This article argues that conventional approaches to the treatment of seasonality in econometric investigation are often inappropriate. A more appropriate technique is to allow all regression coefficients to vary with the season, but to constrain them to do so in a smooth fashion. A Bayesian...

The assumption of rational choice helps in understanding how people respond to infectious diseases. People maximize their well-being by choosing levels of prevention and therapy subject to the constraints they face. Objectives and constraints are numerous, necessitating tradeoffs. For example,...

Many African countries interfere with the spatial pattern of agricultural prices and often mandate a spatially constant (panterritorial) price. Such policies are conceptually identical to the pricing of transport services. The pricing and transportation policies of the Ivoirien cotton parastatal...

The Demographic and Health Surveys (DHS) for Kenya, Tanzania, Uganda and Zambia provide information on how people react to HIV/AIDS: knowledge acquisition; (self-declared) strategies for avoiding HIV; age at first intercourse; monogamy; abstinence; having been tested and wanting to be tested. A...