Taxation policy was a central part of the policy debates over the “fiscal cliff.” Given the importance of fiscal issues, it is vital for rigorous empirical research to inform the policy dialogue.  In keeping with the NBER’s tradition of carrying out rigorous but policy-relevant research, Volume 27 of Tax Policy and the Economy offers insights on a number of key tax policy questions.  This year’s volume features six papers by leading scholars who examine the tax treatment of tuition at private K-12 schools, the potential streamlining of the federal rules for post-secondary financial aid and the use of tax return information in this process, the effect of tax and benefit programs on incentives to work, the macroeconomic effects of fiscal adjustments, and the set of factors that contributed to the weakening US fiscal outlook in the last decade.