I've mostly worked in public-sector bureaucracies, not software companies, so my experiences won't line up exactly. In each case, the rule has been strictly pro-rata. I've generally felt that the company has had the good end of that deal, especially for the higher fractions (0.6/0.8 of full time): productivity seems to me to be non-linear, and trading off the end-of-the-week burnout for a little more payroll admin an…
I mostly agree, although it's worth noting that there are probably some fixed overheads of being employed that eat up some of the otherwise expected benefits. Let's consider a scenario where there are 4h average fixed overhead for working at a company. Now let's run the 0.6 time vs. 1.0 time scenarios. 1.0 time. 40h - 4h overhead = 36h. Pay = 1. Work-to-pay ratio is 36h:1p. 0.6 time. 24h - 4h overhead = 20h. Pay = 0.…
That was one of the big things that me working part-time on a team helped with: they significantly cut down on the mandatory meeting overhead; early on a significant fraction of my time (40%?) was spent in meetings. We cut that down and everyone on the team benefited.