For a balanced panel data regression model with random effects, we discuss the efficiency of the GLS estimator relative to the OLS, the between, and the within estimators. Focus is on how the efficiency responds to changes in (a) the relative variance components and (b) the composition of the...

This lecture discusses relationships between environmental and resource qualities and loads, and economic development, theoretically and empirically. We start in section 2 with a list of theoretical arguments that may or may not justify a tendency for environmental quality to first deteriorate,...

Koopmans’s (Econometrica 28, 287–309) axiomatization of discounted utilitarianism is based on seemingly compelling conditions, yet this criterion leads to hard-to-justify outcomes. The present analysis considers a class of sustainable recursive social welfare functions within Koopmans’s...

This paper considers the so-called fallow-cultivation problem in traditional agriculture. The paper specifies the problem and determines the optimal length of the fallow-cultivation cycle. We also show the impact of rising output prices on this cycle. This has been widely discussed in the...

The International Organization for Migration has collected data on trafficked individuals. The aim of this paper is to use the sub-sample of sexually exploited women in order to explore the relationship between their well being deprivation, their personal characteristics, and their working...

We discuss the relationship between the retirement process of the capital, as formalized by its survival function, and the average retirement rate, and how this relationship is affected by changes in the investment path. The effect of the survival function on the age distribution of the capital...

I derive the marginal value of a public good in multiperson households, measured alternatively by one household member’s willingness to pay (WTP) for the good on behalf of the household, or by the sum of individual WTP values across family members. Households are assumed to allocate their...

We conduct extensive Monte Carlo experiments on non-parametric estimations of duration models with unknown duration dependence and unknown mixing distribution for unobserved heterogeneity. We propose a full non-parametric maximum likelihood approach, based on time-varying lagged explanatory...

Does an income tax harm economic efficiency more the more progressive it is? Public economics provides a strong case for a definite ‘yes’. But at least three forces may pull in the other direction. First, low-wage workers may on average have more elastic labour supply schedules than...