As part of Donald Trump's 2016 presidential campaign, various economists and businesspeople have served both in a formal and an informal capacity, to advise Trump on macroeconomics and associated government policy decisions. During the transition to the presidency, Trump gained additional advisors, and after the inauguration some of his advisors will officially become part of the Trump administration (including the NEC, NTC, advisors, czars, counselors, OMB, CEA, Treasury, Commerce, USTR, SBA, SEC, and the Fed) while others will remain in the private sector as informal advisors with varying degrees of influence.