After Wicksell in 1911 had published the second Swedish edition of his Lectures on Political Economy, a debate began in the Ekonomisk Tidskrift between Wicksell and his opponent Sven Brisman. The controversy was mainly about the concept of capital and the rate of interest, but the circumstances...

In this article we propose a model in which individuals experience habit formation in environmental quality. Further, a consumption good causes a negative external effect on the environment.The intertemporal utility of a benevolent social planner depends on consumption of two goods and the...

We model self-control conflict as a stochastic struggle of an agent against a visceral influence, which impels the agent to act sub-optimally. The agent holds costly pre-commitment technology to avoid the conflict altogether and may decide whether to procure pre-commitment or to confront the...

We analyze optimal social discount rates when people derive utility from relative consumption. We compare the social, private, and conventional Ramsey rates. Assuming a positive growth rate, we find that 1) the social discount rate exceeds the private discount rate if the importance of relative...

We study how gender, birth-order and number of siblings are related to stated time and risk preferences and real-life decisions. We use survey data covering about 2,300 individuals and find that time and risk preferences are significantly correlated among women but not among men. We also find...

Fifteen years of copy-editing experience – with theses (both in economics and in several medical fields), journal articles, book chapters and books, conference presentations, government reports, etc. – are distilled here. Papers are often sent to me for “language correction”, but what I...

Time heterogeneity, or the fact that subjects are measured at different times, occurs frequently in non-experimental situations. For time heterogeneous data having error components regression structure it is demonstrated that under customary normality assumptions there is no estimation method...

Consider a model in which a consumer faces a lottery with j other people for a prize, so that the probability of winning the prize is 1/(j+1). Now let j be a random variable, determined by the binomial distribution. Specifically, let there be n potential competitors for the consumer in the...

Most multivariate variance models suffer from a common problem, the “curse of dimensionality”. For this reason, most are fitted under strong parametric restrictions that reduce the interpretation and flexibility of the models. Recently, the literature has focused on multivariate models with...

Most multivariate variance or volatility models suffer from a common problem, the “curse of dimensionality”. For this reason, most are fitted under strong parametric restrictions that reduce the interpretation and flexibility of the models. Recently, the literature has focused on...