You Don't Say

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According to Zeljka Buturovic and Dan Klein, people who self-identify as “progressive” have low levels of economic knowledge whereas those who self-identify as “libertarian” or “very conservative” rank very highly. 
Matt Yglesias and commenters argue the poll is silly, the results bogus. Nevertheless:
—67% of self-described Progressives believe that restrictions on housing development (i.e., regulations that reduce the supply of housing) do not make housing less affordable.
—51% believe that mandatory licensing of professionals (i.e., reducing the supply of professionals) doesn’t increase the cost of professional services.
—Perhaps most amazing, 79% of self-described Progressive believe that rent control (i.e., price controls) does not lead to housing shortages.