1. Toulouse School of Economics, University Toulouse Capitole, Toulouse, France
2. Department of Economics, McMaster University, Hamilton, Ontario, Canada
3. Graduate Program in Statistics, Department of Mathematics and Statistics, McMaster University, Hamilton, Ontario, Canada
4. Department of Economics and Finance, La Trobe University, Bundoora, Australia
5. Info-Metrics Institute, American University, Rimini Center for Economic Analysis, Washington, DC, USA
6. Economics Department, Stony Brook University, New York, USA