So, Freakonomics (Steve Levitt, Chicago, and journalist Stephen Dubner) blogged and tweeted about my "It's the weather, stupid ..." paper (gated version, ungated version).  Their book sold 4,000,000 copies and their daily tweets alone reach +500,000 followers ...

It's the Weather, Stupid: New evidence from Denmark’s annual May Day demonstrations on the power of the weather. bit.ly/YHDYEF
— freakonomics (@freakonomics) May 9, 2013

BTW: So did my old friend, Lars Christensen at Market Monetarist.
Here and here are