Provides a forum for leading economists to participate in important debates in macroeconomics and to report on major developments in macroeconomic analysis and policy. The NBER Macroeconomics Annual presents research on central issues in contemporary macroeconomics. Martin Kornejew, Chen Lian, Yueran Ma, Pablo Ottonello, and Diego Perez investigate the role of bankruptcy institutions in mitigating the economic fallout of credit crunches following booms and find that efficient institutions reduce the adverse effect of credit tightening on GDP. Santiago Camara, Lawrence Christiano, and Hüsnü Dalgic analyze the global effects of US monetary policy shocks, with particular attention to trade channels and financial frictions, and find that tighter US monetary policy leads to more pronounced contractions in emerging markets than in advanced economies. David Altig, Alan Auerbach, Erin Eidschun, Laurence Kotlikoff, and Victor Yifan Ye assess the welfare costs of inflation through interactions with tax and benefit programs and show that imperfect indexation leads to welfare losses for some households and gains for others. Paul Beaudry, Chenyu Hou, and Franck Portier examine inflation dynamics and find that supply shocks and inflation expectations are pivotal for explaining them. Finally, Davide Debortoli and Jordi Galí develop a simplified two-agent new Keynesian (TANK) model to emulate more complex heterogeneous agent new Keynesian (HANK) models, and use it to examine the many channels through which heterogeneity influences aggregate fluctuations.