Schoenmakers, Wilfred; Duysters, Geert; Vanhaverbeke, Wim - United Nations University-Maastricht Economic Research … - 2008
is very important. For our research we made use of the EPO (European Patent Office) database on patents. We used the … number of forward patent citations per patent to identify radical from non-radical inventions. For our analysis we used the … backward patent citations per patent. In order to test if the two groups we are considering are truly different and to see on …