The effect on aid allocation of the income level and population size in the recipient country is analyzed. The data show that both variables have a significant and robust negative effect, but they explain only a small part of the variation. The main thrust of the paper is a meta-analysis of the...

Publication selection bias represents a serious challenge to the integrity of all empirical sciences. We develop meta-regression approximations that are shown to reduce this bias and outperform conventional meta-analytic methods. Our approach is derived from Taylor polynomial approximations to...