esides, Figure 3.1 does not touch upon the issue that past R&D expendi- tures may have an influence on current patenting (Pakes 1985), which would certainly affect the trends shown in the graph.
esides, Figure 3.1 does not touch upon the issue that past R&D expendi-tures may have an influence on current patenting (Pakes 1985), which wouldcertainly affect the trends shown in the graph.