Affiliation: | (1) Department of Economics, Yale University, Yale Station, Box 1972, 06520 New Haven, Connecticut, USA;(2) 1127 Las Pulgas Place, 90272 Pacific Palisades, California, USA;(3) Pepperdine University, 90265 Malibu, California, USA;(4) Battelle Human Affairs Research Centers, 98105 Seattle, Washington, USA |