14 Oct2010 @j_bettany - 14 Oct 2010Paul Krugman: The Theory of Interstellar Trade – http://bit.ly/93zXL8 ›Post details ↗Original public post Science Fiction Futures Space
1 Jun2012 @j_bettany - 1 Jun 2012Paul Krugman, Science Fiction, Isaac Asimov and the Theory of Interstellar Trade. Cool. #scifi http://t.co/ychamFQJ ›Post details ↗Original public post Science Fiction Futures SpaceWriting Books Literature
