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.
By Jim Gustafsson, Jens Perch Nielsen, Montserrat Guillén, Catalina Bolancé. She received an M.S. degree in Mathematics and Mathematical Statistics in 1987, and a Ph.D. degree in Economics from the University of Barcelona in 1992.
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.