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By Wim Naudé, Thomas Gries, Nicola Dimitri. Wim Naudé is an economist, author, and entrepreneur. He is ranked by Stanford University /Elsevier amongst the top 2 percent of scientists in the world. Thomas Gries studied economics at Göttingen and the University of California.
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.