供给学派尽管声誉不佳,但在政策实践领域,往往是挨骂最多,反而最为成功。里根经济学和撒切尔主义不仅实践了供给学派的理论,并成为实践典范。第二次世界大战后,各国从自由放任的经济政策转向凯恩斯主义的反周期政策,取得空前成功。但好景不长,上世纪70年代,英美等国陷入滞胀危机,令推崇需求管理政策的凯恩斯主义者束手无策。于是,里根经济学和撒切尔主义横空出世。从80年代开始,里根和撒切尔夫人大刀阔斧进 Despite its poor reputation, the supply school often scolded the most in the field of policy practice, but most successfully. Reagan economics and Thatcherism not only practiced the theory of supply school, but also became a model of practice. After the Second World War, all countries shifted their laissez-faire economic policies to Keynesian countercyclical policies and achieved unprecedented success. But in the 1970s, Britain and the United States were caught in a crisis of stagflation, leaving the Keynesians who advocated demand management policies at their fingertips. Thus, Reagan economics and Thatcherism turned out. Since the 1980s, Reagan and Thatcher have taken drastic measures