This paper surveys the microfoundations, empirical evidence, and estimation issues underlying the aggregate matching function. There is no consensus yet on microfoundations but one is emerging on estimation. An aggregate, constant returns, Cobb-Douglas matching function with hires as a function of vacancies and unemployment has been successfully estimated for several countries. Recent work has utilized disaggregated data to go beyond aggregate estimates, with many refinements and suggestions for future research. The paper discusses spatial aggregation issues, and implications of on-the-job search and of the timing of stocks and flows for estimated matching functions.

/pdf/looking-into-the-black-box-a-survey-of-the-matching-function-1boerkl7oh.pdf

Looking into the Black Box: A Survey of the Matching Function

https://eml.berkeley.edu/~webfac/gorodnichenko/gertler.pdf

A model of unconventional monetary policy

Part 1 Empirical evidence on money and output: introduction some basic correlations estimating the effect of money on output summary. Part 2 Money in a general equilibrium framework: introduction the Tobin effect money in the utility function summary appendix - the MIU approximation problems. Part 3 Money and transactions: introduction shopping-time models cash-in-advance models other approaches summary appendix - the CIA approximation problems. Part 4 Money and public finance: introduction bugdet accounting equilibrium seigniorage optimal taxation and seigniorage Friedman's rule revisited nonindexed tax systems problems. Part 5 Money and output in the short run: introduction flexible prices sticky prices and wages a framework for monetary analysis inflation persistence summary appendix problems. Part 6 Money and the open economy: introduction the Obstfeld-Rogoff two-country model policy coordination the small open economy summary appendix problems. Part 7 The credit channel of monetary policy: introduction imperfect information in credit markets macroeconomic implications does credit matter? summary. Part 8 Discretionary policy and time inconsistency: introduction inflation under discretionary policy solutions to the inflation bias is the inflation bias important? do central banking institutions matter? lessons and conclusions problems. Part 9 Monetary-policy operating procedures: introduction from instruments to goals the instrument-choice problem operating procedures and policy measures problems. Part 10 Interest rates and monetary policy: introduction interest-rate rule and the price level interest rate policies in general equilibrium models the term structure of interest rates a model for policy analysis summary problems.

Monetary Theory and Policy

Over the last thirty years, a new paradigm in banking theory has overturned economists' traditional vision of the banking sector. The asymmetric information model, extremely powerful in many areas of economic theory, has proven useful in banking theory both for explaining the role of banks in the economy and for pointing out structural weaknesses in the banking sector that may justify government intervention. In the past, banking courses in most doctoral programs in economics, business, or finance focused either on management or monetary issues and their macroeconomic consequences; a microeconomic theory of banking did not exist because the Arrow-Debreu general equilibrium model of complete contingent markets (the standard reference at the time) was unable to explain the role of banks in the economy. This text provides students with a guide to the microeconomic theory of banking that has emerged since then, examining the main issues and offering the necessary tools for understanding how they have been modeled. This second edition covers the recent dramatic developments in academic research on the microeconomics of banking, with a focus on four important topics: the theory of two-sided markets and its implications for the payment card industry; "non-price competition" and its effect on the competition-stability tradeoff and the entry of new banks; the transmission of monetary policy and the effect on the functioning of the credit market of capital requirements for banks; and the theoretical foundations of banking regulation, which have been clarified, although recent developments in risk modeling have not yet led to a significant parallel development of economic modeling. Praise for the first edition:"The book is a major contribution to the literature on the theory of bankingand intermediation. It brings together and synthesizes a broad range ofmaterial in an accessible way. I recommend it to all serious scholars andstudents of the subject. The authors are to be congratulated on a superbachievement." -- Franklin Allen, Nippon Life Professor of Finance and Economics, WhartonSchool, University of Pennsylvania "This book provides the first comprehensive treatment of the microeconomicsof banking. It gives an impressive synthesis of an enormous body ofresearch developed over the last twenty years. It is clearly written and apleasure to read. What I found particularly useful is the great effort thatXavier Freixas and Jean-Charles Rochet have taken to systematicallyintegrate the theory of financial intermediation into classicalmicroeconomics and finance theory. This book is likely to become essentialreading for all graduate students in economics, business, and finance." -- Patrick Bolton, Barbara and David Zalaznick Professor of Business, Columbia University Graduate School of Business "The authors have provided an extremely thorough and up-to-date survey ofmicroeconomic theories of financial intermediation. This work manages to beboth rigorous and pleasant to read. Such a book was long overdue and shouldbe required reading for anybody interested in the economics of banking andfinance." -- Mathias Dewatripont, Professor of Economics, ECARES, Universit

Microeconomics of banking

This paper examines a model of dynamic price adjustment based on the assumption that information disseminates slowly throughout the population. Compared to the commonly used sticky-price model, this sticky-information model displays three, related properties that are more consistent with accepted views about the effects of monetary policy. First, disinflations are always contractionary (although announced disinflations are less contractionary than surprise ones). Second, monetary policy shocks have their maximum impact on inflation with a substantial delay. Third, the change in inflation is positively correlated with the level of economic activity.

/pdf/sticky-information-versus-sticky-prices-a-proposal-to-it706y12ah.pdf

Sticky Information Versus Sticky Prices: A Proposal to Replace the New Keynesian Phillips Curve

Credit market imperfections provide the key to understanding many important issues in business cycles, growth and development, and international economics. Recent progress in these areas, however, has left in its wake a bewildering array of individual models with seemingly conflicting results. This paper offers a road map. Using the same single model of credit market imperfections throughout, it brings together a diverse set of results within a unified framework. In so doing, it aims to draw a coherent picture, so that one is able to see close connections between these results, thereby showing how a wide range of aggregate phenomena may be attributed to the common cause. They include, among other things, endogenous investment-specific technical changes, development traps, leapfrogging, persistent recessions, recurring boom-and-bust cycles, reverse international capital flows, the rise and fall of inequality across nations, and the patterns of international trade. The framework is also used to investigate ...

Aggregate Implications of Credit Market Imperfections [with Comments and Discussion]

In this article I provide a perspective on the current state of modern business cycle theory. This theory has developed from an application of the Arrow-Debreu general equilibrium framework to the neoclassical growth model. On the positive side, this approach is able to accommodate various sources of heterogeneity in preferences and production within its complete markets framework. On the negative side, this approach has to rely on persistent exogenous shocks to account for business cycles since its internal propagation mechanism is weak. I discuss the implications of three important extensions of the basic framework. The first two extensions, noncompetitive pricing and frictional labor markets, do not overcome the basic weakness of limited propagation. The third extension, limited insurance and exogenous credit constraints, shows promise to account for the amplification and propagation of exogenous shocks.

/pdf/a-perspective-on-modern-business-cycle-theory-lr4qlm1fff.pdf

A Perspective on Modern Business Cycle Theory

We introduce liquidity frictions into an otherwise standard DSGE model with nominal and real rigidities, explicitly incorporating the zero bound on the short-term nominal interest rate. Within this framework, we ask: Can a shock to the liquidity of private paper lead to a collapse in short-term nominal interest rates and a recession like the one associated with the 2008 U.S. financial crisis? Once the nominal interest rate reaches the zero bound, what are the effects of interventions in which the government exchanges liquid government assets for illiquid private paper? We find that the effects of the liquidity shock can be large, and we show some numerical examples in which the liquidity facilities prevented a repeat of the Great Depression in 2008-09.

/pdf/the-great-escape-a-quantitative-evaluation-of-the-fed-s-4awd694ytf.pdf

The Great Escape? A Quantitative Evaluation of the Fed’s Liquidity Facilities

We study theoretically how the adjustment to liberalization of international financial transaction depends upon the degree of domestic financial development. Using a model with domestic and international borrowing constraints, we show that, when the domestic financial system is underdeveloped, capital account liberalization is not necessarily beneficial because TFP stagnates in the long-run or employment decreases in the short-run. Government policy, including allowing foreign direct investment, can mitigate the possible loss of employment, but cannot eliminate it unless the domestic financial system is improved.

Nobuhiro Kiyotaki

Papers

Aggregate Implications of Credit Market Imperfections [with Comments and Discussion]

A Perspective on Modern Business Cycle Theory

The Great Escape? A Quantitative Evaluation of the Fed’s Liquidity Facilities

Adjusting to Capital Account Liberalization

Credit booms, financial crises, and macroprudential policy