Notes, Comments and Preliminary results Feb 21 2013 Joachim Wagner   Are low-productive exporters marginal exporters? Evidence from Germany   Abstract  Contact Information  Citation  Full Text  -  Note   Feb 15 2013 Horst Raff and Joachim Wagner   Productivity and the product scope of multi-product firms: a test of Feenstra-Ma   Abstract  Contact Information  Citation  Full Text  -  Note   Nov 06 2012 Joachim Wagner   Productivity and the extensive margins of trade in German manufacturing firms: Evidence from a non-parametric test   Abstract  Contact Information  Citation  Full Text  -  Note   Jul 16 2012 Joachim Wagner   Exports, R&D and productivity: a test of the Bustos-model with German enterprise data   Abstract  Contact Information  Citation  Full Text  -  Note   Jun 10 2012 Joachim Wagner   German multiple-product, multiple-destination exporters: Bernard-Redding-Schott under test   Abstract  Contact Information  Citation  Full Text  -  Note   Research announcements Conference announcements