By PAUL KRUGMAN - New York Times - AUG. 10, 2014 In the latest Times Magazine, Robert Draper profiled youngish libertarians — roughly speaking, people who combine free-market economics with permissive social views — and asked whether we might be heading for a “libertarian moment.” Well, probably not. Polling suggest s that young Americans tend, if anything, to be more supportive of the case for a bigger government than their elders. But I’d like to ask a different question: Is libertarian economics at all realistic? The answer is no. And the reason can be summed up in one word: phosphorus.