My dad told me that a good manager was right more than 51% of the time. I think he was right -- great managers and leaders probably get it right around 60% of the time, and generally get the big things right. Republicans tend to get facts and theories and bullshit confused and are seldom right but their voters don't care that much. Like heroin, most Republican voters lose in the long run, but it's all about the rush! Quants generally get all the minor shit absolutely spot on, but punt the big things. Go figure.
My buddy Eric "El Norte Chingasa" Garland or something like that makes his living doing predictions, and he tends to be right often enough that he gets calls from moderately important people who ask him reasonably important questions for which he must provide reasonably coherent answers (Shit, man, who knows...it's all stuff. Stuff happens... Not acceptable.) that are mostly correct. Eric is not an economist. He's close enough to right to supplement his wife's income as a physician.
Crispin is a philosopher and card trickster. He doesn't care about being right until he does, and then it's usually too late. But, Crispin is right about 50% of the time and when he's wrong, it's usually due to some misplaced faith in human beings.
I'm right reasonably often -- I am not an economist. I don't get paid to be a prognosticator, so it doesn't matter. But, the only guys I'm aware of who've reasonably correct over the past few years have been the Keynesians. And of course, nobody including the US did what they recommended. So, although long, worth reading. Even considering the source...