This paper describes simple methods for testing various hypotheses of proportionality between the cause-specific hazards in competing risks models. It provides methods for estimating competing risks models with equality restrictions across the cause-specific hazards as single risk models. Thus,...

This paper presents a convenient shortcut method for implementing the Heckman estimator of the dynamic random effects probit model and other dynamic nonlinear panel data models using standard software. It then compares the estimators proposed by Heckman, Orme and Wooldridge, based on three...

This note points out to applied researchers what adjustments are needed to the coefficient estimates in a random effects probit model in order to make valid comparisons in terms of coefficient estimates and marginal effects across different specifications. These adjustments are necessary because...

type="main" xml:id="obes12063-abs-0001" <title type="main">Abstract</title> <p>The empirical literature on the determinants of charities’ donation income, distinguishing the charitable cause, is small. We consider the case of development charities specifically. Using a panel covering a quarter of a century, we observe a...</p>