This paper argues that the impact of monetary policy shocks can interact with the financial environment, in particular with financial uncertainty, making monetary policy's effectiveness state dependent. To that end, we implement a smooth transition VAR model to examine monetary policy shocks, in which the transition between different states depends on the financial uncertainty index of Ludvigson et al. (2015). This uncertainty index extracts the variance of the unforecastable components from a large financial dataset and has advantages over other uncertainty measures. The work identifies that monetary shocks have stronger, but less persistent, effects during periods of elevated financial uncertainty than during tranquil times. These differences in effects among the uncertainty-dependent states suggest that nonlinearities in the credit channel are stronger in the short run, whereas in the long run nonlinearities in the interest rate channel dominate.

Central banks face considerable uncertainty when conducting monetary policy. Some of the reasons for this include limitations of economic data, the unobservability of key macroeconomic variables such as potential output, structural changes to the economy and disagreements over the correct model for the transmission of monetary policy. At the same time, monetary policy is affected by uncertainty from various sources, including lack of or imperfect observation of economic variables, structural economic changes and possible misspecifications using models. We draw from the academic literature to review some of the key sources of this uncertainty and their implications for the conduct of monetary policy. First, we discuss evidence on release lags and revisions to economic data. We also highlight uncertainty around measuring unobservable variables such as the output gap and the natural rate of unemployment. The strength of a trade-off between these measures of economic slack and inflation - a cornerstone of monetary policy - is itself subject to continuous reassessment. Second, the literature finds that different sources of uncertainty may make the optimal conduct of monetary policy either more or less responsive to economic shocks. Additionally, the benefits of tackling uncertainty by engaging in purposeful monetary policy experimentation are typically small but may become more significant during major structural change or following unprecedented shocks.

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.

Oliver Sauter analyzes three aspects of monetary policy under uncertainty. First he shows that the terms risk and uncertainty are often wrongly used as synonyms despite their different meanings. The second aspect is the proper examination and incorporation of uncertainty into a monetary policy framework. The author undertakes systematization with a closer look at each identified form of uncertainty. Thirdly, he focuses on the quantification of uncertainty from two different perspectives, either from a market perspective or from a central bank perspective.

Alan S. Blinder offers the dual perspective of a leading academic macroeconomist who served a stint as Vice-Chairman of the Federal Reserve Board—one who practiced what he had long preached and then returned to academia to write about it. He tells central bankers how they might better incorporate academic knowledge and thinking into the conduct of monetary policy, and he tells scholars how they might reorient their research to be more attuned to reality and thus more useful to central bankers. Based on the 1996 Lionel Robbins Lectures, this readable book deals succinctly, in a nontechnical manner, with a wide variety of issues in monetary policy. The book also includes the author's suggested solution to an age-old problem in monetary theory: what it means for monetary policy to be "neutral."

Inflation is regarded by the many as a menace that damages business and can only make life worse for households. Keeping it low depends critically on ensuring that firms and workers expect it to be low. So expectations of inflation are a key influence on national economic welfare. This collection pulls together a galaxy of world experts (including Roy Batchelor, Richard Curtin and Staffan Linden) on inflation expectations to debate different aspects of the issues involved. The main focus of the volume is on likely inflation developments. A number of factors have led practitioners and academic observers of monetary policy to place increasing emphasis recently on inflation expectations. One is the spread of inflation targeting, invented in New Zealand over 15 years ago, but now encompassing many important economies including Brazil, Canada, Israel and Great Britain. Even more significantly, the European Central Bank, the Bank of Japan and the United States Federal Bank are the leading members of another group of monetary institutions all considering or implementing moves in the same direction. A second is the large reduction in actual inflation that has been observed in most countries over the past decade or so. These considerations underscore the critical – and largely underrecognized - importance of inflation expectations. They emphasize the importance of the issues, and the great need for a volume that offers a clear, systematic treatment of them. This book, under the steely editorship of Peter Sinclair, should prove very important for policy makers and monetary economists alike.