The author, Jaap Denissen, accepted that his conclusions apparently contradicted common sense but insisted that there could be a number of factors to "explain the discrepancy between empiricalresults and widely held beliefs".
If one gets empiricalresults that go against the grain of long-held economic laws, one should be very wary of advocating policies based on those results.
And today, as we are beginning to get better assessments of theresults of policies from experiments and empirical investigations, politicians can be expected to make these facts known.