Traditional shock models view system failure time as a first passage problem. Yeh Lam proposed a new class of models called δ-shock models in which failure was dependent on the frequency of shocks. The present work generalizes Yeh Lam's results for renewal shock arrivals and random threshold....

In state legislative elections some candidates attract contributions from many donors whereas other candidates have much smaller donor pools. Why? What are the origins of these disparities? This paper conceptualizes contributions as a type of attachment between the donor and the state...

The aim of this study is to investigate the impacts of trade policy changes on the order of the size of cities and economic growth of Guatemala between 1921 and 2002. The Pareto coefficient was estimated and an index was used to measure the degree of urban concentration. Finally, a model of the...

Abstract In the present paper we discuss the problem of estimating the survival function R ( x ) = P ( X x ) of the Pareto distribution, when the sample contains discordant observations. Bayes point estimates and credible intervals are obtained by assuming exchangeable and identifiable models...