Jul 26 2014 Joachim Wagner   Exports and firm profitability: Quality matters!   Abstract  Contact Information  Citation  Full Text  -  Note   May 06 2014 Joachim Wagner   What makes a high-quality exporter? Evidence from Germany   Abstract  Contact Information  Citation  Full Text  -  Note   Apr 03 2014 Joachim Wagner   Low-productive exporters are high-quality exporters. Evidence from Germany   Abstract  Contact Information  Citation  Full Text  -  Note