I'm not doing a study.
Was day-dreaming about moving abroad somewhere hot, then wondered if I'd be as productive if I was a bit too hot most of the time. I'm generally quite a hot person anyway, so being in a hotter climate might make me really lethargic. If I'm lethargic, I won't get as much done, won't earn as much and could end up sinking into a heat-induced ambivalence.
Do you know what I mean?
Dangerous stuff, heat.