@booklet {19725, title = {{\textquotedblleft}Curbing Risk on Wall Street{\textquotedblright}}, journal = {National Affairs}, volume = {3}, number = {Spring}, year = {2010}, pages = {20-34}, url = {http://www.nationalaffairs.com/doclib/20100317_HartZingales.pdf}, author = {Oliver Hart and Luigi Zingales} }