Currently, the great majority of economists follow an approach referred to as mainstream economics (sometimes called 'orthodox economics'). Within the mainstream in the United States, distinctions can be made between the Saltwater school (associated with Cornell, Berkeley, Harvard, MIT, Pennsylvania, Princeton, and Yale), and the more laissez-faire ideas of the Freshwater school (represented by the Chicago school of economics, Carnegie Mellon University, the University of Rochester and the University of Minnesota). Both of these schools of thought are associated with the neoclassical synthesis.