Journal of Economic Literature classification: C15, C60, G13.
AcknowledgmentsWe would like to thank E.S. Schwartz for their valuable comments and suggestions. We also thank seminar participants at the Universidad Complutense de
. I would like to thank John J. McConnell, Stephen Figlewski (the editor), and an anonymous referee for their helpful comments and sugestions. The usual caveat applies.
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