Barro's "Macroeconomics" Highlights Chilean Pension Reform The fifth edition of Harvard economist Robert J. Barro's Macroeconomics, one of the most widely used textbooks in intermediate macroeconomics courses in U.S. universities, contains a section on "Social Security and Saving" that mentions the Chilean system as a model of fully funded privatized social security systems. The text cites José Piñera's essay, "Empowering Workers: The Privatization of Social Security in Chile."