Thomas Lambert, an applied economist at the University of Louisville's College of Business, wasn't quite sure if he could trust the dollar amounts that were routinely cited regarding the impact of the GI Kentucky Derby on the region's economy. So he took on the task of finding out for himself, and has just published the results in a study titled, "Horse Sense or Horse Hype? Estimating the True Economic Impact of Churchill Downs and the Kentucky Derby on the Louisville Metro Area." Lambert started by noting that the results of...