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By Jan Petter Hansen, Jan R. Lien, Patrick A. Narbel. Patrick A. Narbel obtained his PhD from the Norwegian School of Economics. Jan Petter Hansen is a professor of the University of Bergen, Norway and adjoint professor of the Norwegian School of Economics.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.