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. Daron Acemoglu is Charles P. Kindleberger Professor of Applied Economics at MIT. Kenneth Rogoff is Thomas D. Cabot Professor of Public Policy and Professor of Economics at Harvard University. Michael Woodford is John Bates Clark Professor of Political Economy at Columbia University. All three are Research Associates of the National Bureau of Economic Research.

The 20th NBER Macroeconomics Annual, covering questions at the cutting edge of macroeconomics that are central to current policy debates.

Optimal tax design attempts to resolve a well-known trade-off: namely, that high taxes are bad insofar as they discourage people from working, but good to the degree that, by redistributing wealth, they help insure people against productivity shocks. Until recently, however, economic research on this question either ignored people's uncertainty about their future productivities or imposed strong and unrealistic functional form restrictions on taxes. In response to these problems, the new dynamic public finance was developed to study the design of optimal taxes given only minimal restrictions on the set of possible tax instruments, and on the nature of shocks affecting people in the economy. In this book, Narayana Kocherlakota surveys and discusses this exciting new approach to public finance. An important book for advanced PhD courses in public finance and macroeconomics, The New Dynamic Public Finance provides a formal connection between the problem of dynamic optimal taxation and dynamic principal-agent contracting theory. This connection means that the properties of solutions to principal-agent problems can be used to determine the properties of optimal tax systems. The book shows that such optimal tax systems necessarily involve asset income taxes, which may depend in sophisticated ways on current and past labor incomes. It also addresses the implications of this new approach for qualitative properties of optimal monetary policy, optimal government debt policy, and optimal bequest taxes. In addition, the book describes computational methods for approximate calculation of optimal taxes, and discusses possible paths for future research.

The NBER Macroeconomics Annual presents, extends, and applies pioneering work in macroeconomics and stimulates work by macroeconomists on important policy issues. Each paper in the Annual is followed by comments and discussion.

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 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 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.

Papers by leading researchers consider such questions as the effect of government debt on interest rates; technology shocks, demand shocks, and output volatility; and procyclical macroeconomic policies in developing countries.

The NBER Macroeconomics Annual presents pioneering work in macroeconomics by leading academic researchers to an audience of public policymakers and the academic community. Each commissioned paper is followed by comments and discussion. This year's edition provides a mix of cutting-edge research and policy analysis on such topics as productivity and information technology, the increase in wealth inequality, behavioral economics, and inflation.