Affiliation: | 1. Department of Economics, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Av. Ipiranga, 6681, Prédio 50, sala 1001, Porto Alegre, RS, 90619-900, Brazil 2. Regional Economics Applications Laboratory (REAL), University of Illinois at Urbana-Champaign, 607 S. Mathews, Urbana, IL, 61801-3671, USA
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