Affiliation: | 1. Department of Economics, National Taiwan University, 27 Hsu-Chow Road, Taipei, 100, Taiwan 2. Department of Economics, Tamkang University, 151 Ying-chuan Road, Tamsui, 251, Taiwan 3. The Institute of Economics, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, 115, Taiwan
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