En 2009, Greg Mankiw, economista de Harvard, elaboró una lista con diversas tesis apoyadas por al menos un 90% de los economistas, entre ellas: imponer aranceles y cuotas a las importaciones reduce el bienestar económico general; el control de alquileres reduce la oferta de vivienda; la flotación cambiaria permite un sistema monetario internacional eficaz;
The following propositions garnered support from at least 90% of economists: import tariffs and quotas reduce general economic welfare; rent controls reduce the supply of housing; floating exchange rates provide an effective international monetary system; the US should not restrict employers from outsourcing work to foreign countries; and fiscal policy stimulates the economy when there is less than full employment.