First Author:   Myrna Wooders University of Warwick M.Wooders@warwick.ac.uk   Department of Economics, University of Warwick, Gibbet Hill Road Coventry, CV4 7AL, UK   (44) (0) 2476 523 796(Phone) (44) (0) 2476 523 796(Fax) http://www.warwick.ac.uk/fac/soc/Economics/wooders/ Second Author: Edward Cartwright University of Warwick ecpky@warwick.ac.uk   Department of Economics, University of Warwick, Gibbet Hill Road Coventry, CV4 7AL, UK     (44) 2476 523 032(Fax)