Endogeneity in Okun’s law

Gang Huang, Ho-Chuan Huang, Xiaojian Liu and Jiangang Zhang

Applied Economics Letters, 2020, vol. 27, issue 11, 910-914

Abstract: This article contributes to the literature of Okun’s law by addressing an under-noticed but important problem, i.e. endogeneity. By using annual variation in the international oil price weighted with countries’ average oil net-export GDP ratios as a plausibly exogenous instrumental variable for economic growth, the two-stage least squares estimates indicate that faster real GDP growth is associated with lower overall, male and female unemployment rates, confirming the validity of Okun’s law. According to our benchmark estimate, 1 percentage point increase in economic growth leads to a 0.252 percentage point decrease in civil unemployment rate.

Date: 2020
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DOI: 10.1080/13504851.2019.1646861

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