Are unemployment rates in OECD countries stationary? Evidence from univariate and panel unit root tests / Naceur Khraief (University of Sousse and GREDEG, University of Nice Sophia Antipolis), Muhammad Shahbaz (COMSATS Institute of Information Technology), Almas Heshmati (Sogang University and IZA), Muhammad Azam (Universiti Utara Malaysia). Bonn : IZA, 2015
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