Robustness

Robustness
Author: Lars Peter Hansen
Publisher: Princeton University Press
Total Pages: 453
Release: 2016-06-28
Genre: Business & Economics
ISBN: 0691170975

The standard theory of decision making under uncertainty advises the decision maker to form a statistical model linking outcomes to decisions and then to choose the optimal distribution of outcomes. This assumes that the decision maker trusts the model completely. But what should a decision maker do if the model cannot be trusted? Lars Hansen and Thomas Sargent, two leading macroeconomists, push the field forward as they set about answering this question. They adapt robust control techniques and apply them to economics. By using this theory to let decision makers acknowledge misspecification in economic modeling, the authors develop applications to a variety of problems in dynamic macroeconomics. Technical, rigorous, and self-contained, this book will be useful for macroeconomists who seek to improve the robustness of decision-making processes.

NBER Macroeconomics Annual 2005

NBER Macroeconomics Annual 2005
Author: Kenneth S. Rogoff
Publisher: MIT Press
Total Pages: 479
Release: 2006-04
Genre: Business & Economics
ISBN: 0262072726

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

Robust Optimal Macroprudential Policy

Robust Optimal Macroprudential Policy
Author: Giselle Montamat
Publisher: International Monetary Fund
Total Pages: 61
Release: 2021-02-26
Genre: Business & Economics
ISBN: 1513570757

We consider how fear of model misspecification on the part of the planner and/or the households affects welfare gains from optimal macroprudential taxes in an economy with occasionally binding collateral constraints as in Bianchi (2011). On the one hand, there exist welfare gains from internalizing how borrowing decisions in good times affect the value of collateral during a crisis. On the other hand, interventions by a robust planner that has in mind a model far from the true underlying distribution of shocks, can result in negligible welfare gains, or even losses. This is because a policy that is robust to misspecification, as in Hansen and Sargent (2011), is optimal under a "worst-case'' scenario but not under alternative distributions of the state. A robust planner introduces taxes that are 5 percentage points higher but does not achieve a significant increase in welfare gains compared to a non-robust planner when the true underlying model is not the worst-case. If households also make choices that are robust to model misspecification, the gains are significantly reduced and a highly-robust planner "underborrows" and induces welfare losses. If, however, the worst-case scenario is indeed realized, then welfare gains are the largest possible.

NBER Macroeconomics Annual 2003

NBER Macroeconomics Annual 2003
Author: Mark Gertler
Publisher: MIT Press
Total Pages: 436
Release: 2004
Genre: Business & Economics
ISBN: 9780262572217

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.

The Effectiveness of Fiscal Policy in Stimulating Economic Activity

The Effectiveness of Fiscal Policy in Stimulating Economic Activity
Author: Richard Hemming
Publisher: International Monetary Fund
Total Pages: 62
Release: 2002-12
Genre: Business & Economics
ISBN:

This paper reviews the theoretical and empirical literature on the effectiveness of fiscal policy. The focus is on the size of fiscal multipliers, and on the possibility that multipliers can turn negative (i.e., that fiscal contractions can be expansionary). The paper concludes that fiscal multipliers are overwhelmingly positive but small. However, there is some evidence of negative fiscal multipliers.

Fiscal Policy and Long-Term Growth

Fiscal Policy and Long-Term Growth
Author: International Monetary Fund
Publisher: International Monetary Fund
Total Pages: 257
Release: 2015-04-20
Genre: Business & Economics
ISBN: 1498344658

This paper explores how fiscal policy can affect medium- to long-term growth. It identifies the main channels through which fiscal policy can influence growth and distills practical lessons for policymakers. The particular mix of policy measures, however, will depend on country-specific conditions, capacities, and preferences. The paper draws on the Fund’s extensive technical assistance on fiscal reforms as well as several analytical studies, including a novel approach for country studies, a statistical analysis of growth accelerations following fiscal reforms, and simulations of an endogenous growth model.

Robust Optimization

Robust Optimization
Author: Aharon Ben-Tal
Publisher: Princeton University Press
Total Pages: 565
Release: 2009-08-10
Genre: Mathematics
ISBN: 1400831059

Robust optimization is still a relatively new approach to optimization problems affected by uncertainty, but it has already proved so useful in real applications that it is difficult to tackle such problems today without considering this powerful methodology. Written by the principal developers of robust optimization, and describing the main achievements of a decade of research, this is the first book to provide a comprehensive and up-to-date account of the subject. Robust optimization is designed to meet some major challenges associated with uncertainty-affected optimization problems: to operate under lack of full information on the nature of uncertainty; to model the problem in a form that can be solved efficiently; and to provide guarantees about the performance of the solution. The book starts with a relatively simple treatment of uncertain linear programming, proceeding with a deep analysis of the interconnections between the construction of appropriate uncertainty sets and the classical chance constraints (probabilistic) approach. It then develops the robust optimization theory for uncertain conic quadratic and semidefinite optimization problems and dynamic (multistage) problems. The theory is supported by numerous examples and computational illustrations. An essential book for anyone working on optimization and decision making under uncertainty, Robust Optimization also makes an ideal graduate textbook on the subject.

The Inflation-Targeting Debate

The Inflation-Targeting Debate
Author: Ben S. Bernanke
Publisher: University of Chicago Press
Total Pages: 469
Release: 2007-11-01
Genre: Business & Economics
ISBN: 0226044734

Over the past fifteen years, a significant number of industrialized and middle-income countries have adopted inflation targeting as a framework for monetary policymaking. As the name suggests, in such inflation-targeting regimes, the central bank is responsible for achieving a publicly announced target for the inflation rate. While the objective of controlling inflation enjoys wide support among both academic experts and policymakers, and while the countries that have followed this model have generally experienced good macroeconomic outcomes, many important questions about inflation targeting remain. In Inflation Targeting, a distinguished group of contributors explores the many underexamined dimensions of inflation targeting—its potential, its successes, and its limitations—from both a theoretical and an empirical standpoint, and for both developed and emerging economies. The volume opens with a discussion of the optimal formulation of inflation-targeting policy and continues with a debate about the desirability of such a model for the United States. The concluding chapters discuss the special problems of inflation targeting in emerging markets, including the Czech Republic, Poland, and Hungary.

Optimal Monetary Policy under Uncertainty, Second Edition

Optimal Monetary Policy under Uncertainty, Second Edition
Author: Richard T. Froyen
Publisher: Edward Elgar Publishing
Total Pages: 432
Release: 2019
Genre: Electronic books
ISBN: 1784717193

This book provides a thorough survey of the model-based literature on optimal monetary in a stochastic setting. The survey begins with the literature of the 1970s which focused on the information problem in policy design and extends to the New Keynesian approach of the 1990s which centered on evaluating alternative targeting strategies. New to the second edition is consideration of research since the world financial crisis on the role of financial markets and institutions in the conduct of monetary policy.

Asset Prices and Monetary Policy

Asset Prices and Monetary Policy
Author: John Y. Campbell
Publisher: University of Chicago Press
Total Pages: 444
Release: 2008-11-15
Genre: Business & Economics
ISBN: 0226092127

Economic growth, low inflation, and financial stability are among the most important goals of policy makers, and central banks such as the Federal Reserve are key institutions for achieving these goals. In Asset Prices and Monetary Policy, leading scholars and practitioners probe the interaction of central banks, asset markets, and the general economy to forge a new understanding of the challenges facing policy makers as they manage an increasingly complex economic system. The contributors examine how central bankers determine their policy prescriptions with reference to the fluctuating housing market, the balance of debt and credit, changing beliefs of investors, the level of commodity prices, and other factors. At a time when the public has never been more involved in stocks, retirement funds, and real estate investment, this insightful book will be useful to all those concerned with the current state of the economy.