Why tell this lie? It's easily checked. It undermines the credibility of everything else Peter Klein might say…
The Sorry State of Economic Journalism « Organizations and Markets: (Yglesias mistakenly attributes Hayek’s Nobel prize to his work on tacit knowledge, when in fact the prize was given for business-cycle theory.)
The Nobel Foundation:
The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 1974 was awarded jointly to Gunnar Myrdal and Friedrich August von Hayek
for their pioneering work in the theory of money and economic fluctuations and for their penetrating analysis of the interdependence of economic, social and institutional phenomena.
UPDATE: I see from the comments I dropped two paragraphs out of this post. This is Yglesias's only mention of Hayek's Nobel Prize:
What Is Austrian Economics? And Why Is Ron Paul Keep Obsessed With It?: a[A]n appreciation for Hayek’s work by no means makes you an “Austrian.” Hayek, who died in 1992, won the Nobel Prize, and mainstream economists thoroughly embraced his important work explicating the role of the price system in conveying information. His ideas undergird everything from carbon taxes to wireless spectrum auctions and thoroughly permeate policy throughout the Western world.