According to University of Michigan sociology Professor Elizabeth Popp Berman, progressives like Sen. Bernie Sanders (I-Vt.) Sen. Elizabeth Warren (D-Mass.) and Rep. Alexandria Ocasio-Cortez (D-N.Y.) are “grounded in the values of rights, universalism, equity and limiting corporate power.”

In her book, “Thinking Like an Economist: How Efficiency Replaced Equality in U.S. Public Policy,” however, Berman argues that economists and the economic way of thinking have been the bane of the progressive movement.

One thing is certain: Progressives do not think like economists.

Economists, while not a homogeneous lot, generally are grounded in the laws of supply and demand and the recognition of opportunity costs and cost-benefit analysis. They believe that scarcity exists, that incentives matter and that economic efficiency provides broad benefits to society. All of these are rejected by progressives when public policies conflict with their “values.” Berman claims that progressives have different ways of thinking.