Using your own link sister can you paraphrase the conclusions reached by the researchers cited?
Blinder and Watson concluded that: “Rather, it appears that the Democratic edge stems mainly from more benign oil shocks, superior total factor productivity (TFP) performance, a more favorable international environment, and perhaps more optimistic consumer expectations about the near-term future.”
[1]
Just spit balling I’d translate that as dumb luck. And about that last sentence in the current economic environment … LMAO