Immediately following the Chilean coup of 1973, Augusto Pinochet was made aware of a confidential economic plan known as El ladrillo[12] (literally, "the brick"), so called because the report was "as thick as a brick". The plan had been quietly prepared in May 1973 [13] by economists who opposed Salvador Allende's government, with the help from a group of economists the press were calling the Chicago Boys, because they were predominantly alumni of the University of Chicago.