To a great extent, fertility decline in Tunisia can be explained by the rise in the age at which women marry, probably because they are better educated and because social legislation has given them more rights. A second major factor in fertility decline was the increased use of contraception....

Research in developing countries is rarely focused on examining how supply side factors affect family planning decisions due to a lack of facility-level data. When these data exist, analyses tend to focus on rural environments. In this paper we study the effects that health facility access and...

Using Add Health, a very comprehensive longitudinal data set of teenagers and young adults in the United States, we estimate a structural dynamic model of the determinants of obesity. In addition to including many of the well-recognized endogenous factors mentioned in the literature as obesity...

The ongoing debate about the economic causes of obesity has focused on the changing relative prices of diet and exercise. This paper uses a model that explicitly includes time and spatially varying community-level urbanicity and price measures as instruments to obtain statistically correct...

This article serves as a practical guide for implementing longitudinal estimation procedures in program impact evaluation. Throughout, we use as examples the data and objectives of the the Measurement, Learning & Evaluation (MLE) Project of the Urban Reproductive Health Initiative and the...

The ongoing debate about the economic causes of obesity has focused on the changing relative prices of diet and exercise. This paper uses a model that explicitly includes time and spatially varying community-level urbanicity and price measures as instruments to obtain statistically correct...