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Humboldt Univ, CASE Ctr Appl Stat & Econ, Ladislaus von Bortkiewicz Chair Stat, D-10099 Berlin, Germany
Singapore Management Univ, Lee Kong Chian Sch Business, Singapore 178902, Singapore Humboldt Univ, CASE Ctr Appl Stat & Econ, Ladislaus von Bortkiewicz Chair Stat, D-10099 Berlin, Germany