Looking at the overall results, there appears to be a convincing amount of evidence
to endorse the explanation of the production paradox given in section 2: R&D has
become more and more devoted to product differentiation than to (product or)
process innovation, thus hardly affecting economic growth but more so total
consumers' welfare. The next step would be testing the explanation further by embedding it into a formal, empirically testable economic model. In doing so, the real interest rate should be explicitly taken along. However, this will have to remain a point for further study