The 2010 book Better Living through Economics, edited by John Siegfried, emphasizes the real-world impact of such innovations: emissions trading, the earned-income tax credit, low trade tariffs, welfare-to-work programs, more effective monetary policy, auctions of spectrum licenses, transport-sector deregulation, deferred-acceptance algorithms, enlightened antitrust policy, an all-volunteer military, and clever use of default options to promote saving for retirement.