Paul Romer on Elinor Ostrom and Crucial Assumptions

Paul Romer makes some interesting comments on Elinor Ostrom's Nobel Prize win. He points out that many or most economic theories depend on what he calls "skyhooks" - what http://stochastictrend.blogspot.com/2009/08/crucial-assumptions.html">I called "crucial assumptions". According to Romer assuming that people follow rules is a typical "skyhook". Rather than assuming that people would follow