This a webpage established by American Economics Association giving detailed descriptions of graduate training ineconomics in the US.Information contained in this page are  mainly  devided into two parts,namely ,garduate training in economics and careers in economics ,of which each part contains several sub-sections (e.g. considerations for propesctive garduate students in economics ).I truly hope that these valuable information will offer you useful guardance in your puisuit of academic career in economic in the US.
http://www.aeaweb.org/gradstudents/index.php