Which economist from University of Chicago argued in favor of demand reduction? 
Demand reduction:  Some economists such as Milton Friedman argue that due to the law of supply and demand, reducing demand is the only effective way to reduce drug use long-term. Milton Friedman:  With George Stigler and others, Friedman was among the intellectual leaders of the second generation of Chicago price theory, a methodological movement at the University of Chicago's Department of Economics, Law School, and Graduate School of Business from the 1940s onward.
Milton Friedman