Does anyone still believe in trickle down economics?

No. Nobody still believes in trickle down economics, because nobody ever HAS believed in trickle down economics. No economist has ever advocated any policy called trickle down economics. read more

Trickle down economics" is a very bad name for supply side, and in fact is a more appropriate term for demand side, Keynesian economics. People who think about economics like a Keynesian seem to think that where the money goes is what is important. read more

That doesn’t validate “trickle down” or “supply side” economics. The fact that the taxes studied in the second instance were independent of a contraction means that no evidence for Keynesian views is presented here, one way or another. read more