This is the eleventh volume in a series of annuals from the National Bureau of Economic Research that are designed to present, extend, and apply frontier work in macroeconomics, and to encourage and stimulate work by macroeconomists on current policy issues. These contributions offer a good sample of the current issues and exciting research directions in macroeconomics. Contents Credit, Business Investment, and Output Fluctuations in Japan, Nobuhiro Kiyotaki and Kenneth D. West * Causes and Consequences of Imperfections in the Consumer Price Index, Matthew D. Shapiro and David Wilcox * A Scorecard for Indexed Government Debt, John Y. Campbell and Robert J. Shiller * Technology Improvements and Productivity Slowdowns: Another Crazy Explanation, Andreas Hornstein and Per Krusell * Are Currency Crises Self-Fulfilling?, Paul Krugman * Inequity and Growth, Roland Benabou

Essays exploring the relationship between economic growth and inequality and the implications for policy makers.

The twenty-seventh edition of the NBER Macroeconomics Annual continues a tradition of featuring theoretical and empirical contributions that shed light on central issues in contemporary macroeconomics, pushing the frontiers of macroeconomic research on topics related to both the business cycle and economic growth and addressing important policy-relevant questions. This year's volume features two papers that illuminate two causes of the recent financial crisis: how firms accessed credit during the financial crisis and how the risk in mortgage lending was measured in the UK in the decades before the crisis. Other papers in this volume include a study of individual prices over time that draws out the implications of observed price adjustment for macroeconomic models of price stickiness, a focus on the implications of microeconomic estimates of labor supply for the determination of employment rates, a study of the empirical validity of the Keynesian explanation for employment declines during recessions, and an innovative paper that measures the efficacy of fiscal stimulus by looking at the economic impact of changes in federal highway spending across US states.

Discussions of questions at the cutting edge of macroeconomics that are central to contemporary policy debates, analyzing both current macroeconomic issues and recent theoretical advances. This 21st edition of the NBER Macroeconomics Annual treats many questions at the cutting edge of macroeconomics that are central to current policy debates. The first four papers and discussions focus on such current macroeconomic issues as how structural-vector-autoregressions help identify sources of business cycle fluctuations and the evolution of U.S. macroeconomic policies. The last two papers analyze theoretical developments in optimal taxation policy and equilibrium yield curves.

The goals of the annual NBER Macroeconomics Conference are to present, extend, and apply frontier work in macroeconomics and to stimulate work by macroeconomists in policy issues. Each paper in the Annual is followed by comments and discussion.

The NBER Macroeconomics Annual provides a forum for important debates in contemporary macroeconomics and major developments in the theory of macroeconomic analysis and policy that include leading economists from a variety of fields. The papers and accompanying discussions in NBER Macroeconomics Annual 2009 address how heterogeneous beliefs interact with equilibrium leverage and potentially lead to leverage cycles, the validity of alternative hypotheses about the reason for the recent increase in foreclosures on residential mortgages, the credit rating crisis, quantitative implications for the evolution of the U.S. wage distribution, and noisy business cycles.