This study explores the relationship between energy and material efficiency innovations (EMEIs) and innovation strategies employed by manufacturing firms to develop their process innovations. Firms may mainly develop process innovations in-house, let them mainly develop by other enterprises or...

The Patentatlas by Greif and Schmiedl (2002) represents an important source for patent data in Germany. Its use for industry-specific studies is however problematic because the correct assignment of patent data classified by technological fields to commonly used industry classifications is...