Affiliation: | 1. Paris School of Economics, Université Paris 1 Panthéon Sorbonne, 106–112 Boulevard de l’H?pital, 75647?, Paris Cedex 13, France 5. ATE, Auckland, New Zealand 2. School of Economics and Finance (Albany), Massey University, PB 102904, NSMC, 0745?, Auckland, New Zealand 3. Centre for Mathematical Social Science, University of Auckland, Auckland, New Zealand 4. Department of Economics, University of Otago, P. O. Box 56, 9054?, Dunedin, New Zealand
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