@johnntowse @alexwild The other point is that using a bigger citation data source might give a different result if there is a real effect but the effect size isn't huge and the statistical power not quite there. That's another thing that would be relatively easy to test with OpenCitations and the DOIs (I'll put it on the list...)
@cameronneylon @alexwild
The issue of power is discussed in the paper of course, but I am sympathetic to the argument there the effect size is not that impactful (even if it exists at the population level, it’s not making much difference for the individuals who do or don’t tweet about their papers)