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Reference charts are valuable tools for clinicians in their daily work on pediatric clinics. Reference charts are often constructed by smoothing techniques, and in this paper we present a newly developed non-parametric test for comparing these charts. We illustrate the method by two examples. The rst example compares crosssectional data on height in children from two Danish studies from 1970 an...

This paper is concerned with the problem of determining the e!ect of a categorical treatment variable on a response given that the treatment is non-randomly assigned and the response (on any given subject) is observed for one setting of the treatment. We consider classes of models that are designed for such problems. These models are subjected to a fully Bayesian analysis based on Markov chain ...

We employ the string method to numerically evaluate the thermally activated phase slips in one-dimensional superconducting wires with nonuniform cross section. A defect with reduced cross-sectional area opens up a channel for phase-slip transition, for which the free-energy barrier and the preexponential factor associated with the transition rate are numerically calculated. The contribution of ...

We minimize, with respect to the cross sectional area, the mass of a bar given the rate of heat transfer. The bar enhances the heat transfer surface of a larger known mass to which the bar is attached. This article is an extension of a previous publication by two coauthors, where heat transfer from the sides of the bar was neglected and only conduction through its length was considered. The rat...

I build a simple dynamic model of the formation of an international social network of importers and exporters. Firms can only export into markets in which they have a contact. They acquire new contacts both at random, and via their network of existing contacts. This model explains (i) the cross-sectional distribution of the number of foreign markets accessed by individual exporters, (ii) the cr...

A significant relationship exists between stock returns and real estate prices. This type of relationship, which is in contrast to findings in most of the existing studies, can be attributed to the added power resulting from the large cross section of the study. Also, it can be attributed to the use of lags in time-series regressions and to the longer holding periods utilized in the cross-secti...