@techreport{NBERw12516,
 title = "Gravity for Dummies and Dummies for Gravity Equations",
 author = "Richard Baldwin and Daria Taglioni",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12516",
 year = "2006",
 month = "September",
 URL = "http://www.nber.org/papers/w12516",
}