He's tall. He's ranked in the top 20 at IDEAS. He blogs. He's a macro-wonk.
Congratulations to Yang Yang for correctly identifying N. Gregory Mankiw as the mystery economist. A Harvard economist, Mankiw is a renowned macroeconomist and a former chairman of the Council of Economic Advisors for President George W. Bush. He is the author of two popular textbooks in the field and also blogs on a regular basis. And he is 6'2" tall.