First Author:   Christopher Spencer University of Surrey c.spencer@surrey.ac.uk   Department of Economics, University of Surrey Guildford, GU2 7XH, UK   #44 1483 682771(Phone) #44 1483 682771(Fax) Second Author: Paul Levine University of Surrey p.levine@surrey.ac.uk   Department of Economics, University of Surrey Guildford, GU2 7XH, UK   #44 1483 686954(Phone)   http://www.econ.surrey.ac.uk/staff/plevine/plevine.htm Third Author: Parimal Bag University of Surrey p.bag@surrey.ac.uk   Department of Economics, University of Surrey Guildford, GU2 7XH, UK   #44 1483 682772(Phone)   http://www.econ.surrey.ac.uk/staff/pbag/pbag.htm