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<p>Read the NBER paper on which the NY Times chart is based. Then tell me what you think.</p>
<p><a href=“http://papers.ssrn.com/sol3/papers.cfm?abstract_id=601105[/url]”>http://papers.ssrn.com/sol3/papers.cfm?abstract_id=601105</a></p>
<p>In my experience, most (not all) people who dispute the findings of the Revealed Preference study either haven’t read it or didn’t understand it.</p>