Twelve econometric studies investigating the impact of agoa presented in this paper have reported 174 different estimates. In testing for publication bias and whether there is a genuine empirical impact of agoa we resort to a meta-analysis. The meta-analysis provides us with a formal means of testing for publication bias and an empirical effect. The result shows signiﬁcant publication bias in the selected studies. However, in a few cases the test for a genuine effect is passed successfully. The results of the meta-analysis indicates that agoa increased the trade of beneﬁciaries by 13.2%.Trade preference regimes; African Growth and Opportunity Act (AGOA); Publication bias; Meta-Regression Analysis; Funnel plot; Study effect
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