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This paper discusses recent trends in the use of replications in economics. We include the results of recent replication studies that have attempted to identify replication rates within the discipline. These studies generally find that replication rates are relatively low. We then consider obstacles to undertaking replication studies and highlight replication initiatives in psychology and political science, behind which economics appears to lag.

Bekanntlich können Schätzungen von kompensierenden Lohndifferentialen dadurch verzerrt werden, daß die Produktivität von Arbeitskräften nicht vollständig beobachtet werden kann. Die Autoren zeigen mit einer stochastischen Modellanalyse, daß diese Verzerrung sehr hoch sein kann. Vermutlich unterschätzen daher die meisten empirischen Studien den Umfang von kompensierenden Lohndifferentialen und die Bereitschaft von Arbeitskräften, Lohneinbußen in Kauf zu nehmen, wenn dafür die Arbeitstätigkeit mehr ihren Vorstellungen entspricht. (IAB2)

This study empirically tests the "Culture of Spending" hypothesis (Payne, 199la). According to this hypothesis, the longer congressmen stay in office, the more likely they are to support federal spending. Spending behavior in this study is measured by the National Taxpayers Union (NTU) Congressional Spending Score. Samples are drawn from annual spending scores for all U.S. representatives and senators who served in office between 1975 and 1993. This study finds no statistical support for the hypothesis that congressmen have an increasing propensity to support federal spending the longer they stay in office. Furthermore, we are able to explain why other studies obtain results different from ours.

AbstractThis study uses a meta‐analysis to synthesize the effects of agricultural cooperative membership on the yield of crops and livestock. It collects 158 estimated yield effects from 42 studies, covering 19 developing countries. Our analysis finds evidence that there exists positive publication bias in the empirical literature, confirming that researchers and journals have a preference to publish articles that report positive and significant results. After correcting for publication bias, we find that cooperative membership has a small‐sized and insignificant effect on the yield. The meta‐regression analysis reveals that variation in the reported yield effects can be largely explained by the study attributes such as the sample type (full sample vs. subsample), membership ratio, econometric approaches (instrumental‐variable based parametric approach, non‐parametric approach or ordinary least square regression), effect size types (average treatment effects on the treated, average treatment effects, or coefficient), agro‐product type (grain or others), and climate zones (tropical or non‐tropical).