Nov 20 2015 Joachim Wagner   Share of exports to low-income countries, productivity, and innovation: A replication study with firm-level data from six European countries   Abstract  Contact Information  Citation  Full Text  -  Note   Mar 23 2015 Joachim Wagner   Exports, R&D and Productivity: A test of the Bustos-model with enterprise data from France, Italy and Spain   Abstract  Contact Information  Citation  Full Text  -  Note   Mar 11 2015 Joachim Wagner   Firm age and the margins of international trade: Comparable evidence from five European countries   Abstract  Contact Information  Citation  Full Text  -  Note