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Individual Expectations and Aggregate Macro Behavior

The way in which individual expectations shape aggregate macroeconomic variables is crucial for the transmission and effectiveness of monetary policy. We study the individual expectations formation process and the interaction with monetary policy, within a standard New Keynesian model, by means of laboratory experiments with human subjects. Three aggregate outcomes are observed: convergence to some equilibrium level, persistent oscillatory behavior and oscillatory convergence. We fit a heterogeneous expectations model with a performance-based evolutionary selection among heterogeneous forecasting heuristics to the experimental data. A simple heterogeneous expectations switching model fits individual learning as well as aggregate macro behavior and outperforms homogeneous expectations benchmarks. Moreover, in accordance to theoretical results in the literature on monetary policy, we find that an interest rate rule that reacts more than point for point to inflation has some stabilizing effects on inflation in our experimental economies, although convergence can be slow in presence of evolutionary learning.

Animal Spirits, Heterogeneous Expectations and the Emergence of Booms and Busts

We introduce a simple equilibrium model of a market for loans, where households lend to firms based on heterogeneous expectations about their loan default probability. Agents select among heterogeneous expectation rules, based upon their relative performance. A small fraction of pessimistic traders already has a large aggregate effect, leading to a crisis characterized by high contract rates for loans and low output. Our stylized model illustrates how animal spirits and heterogeneous expectations amplify boom and bust cycles and how endogenous coordination on pessimistic expectations amplifies crises and slows down recovery. Taking heterogeneous expectations and bounded rationality into account is crucial for the timing of monetary or fiscal policy.

Experiments on expectations in macroeconomics and finance

Expectations play a crucial role in nance, macroeconomics, monetary economics and fiscal policy. In the last decade a rapidly increasing number of laboratory experiments have been performed to study individual expectation formation, the interactions of individual forecasting rules and the aggregate macro behavior they co-create. The aim of this chapter is to provide a comprehensive literature survey on laboratory experiments on expectations in macroeconomics and finance. In particular, we discuss the extent to which expectations are rational or may be described by simple forecasting heuristics, at the individual as well as the aggregate level.

Animal Spirits, Heterogeneous Expectations and the Amplification and Duration of Crises

We introduce a simple equilibrium model of a market for loans. Households lend to firms and form expectations about their loan default probability. Under heterogeneous expectations, with switching between forecasting strategies driven by reinforcement learning, even a small fraction of pessimistic traders has a large aggregate effect, causing a heterogeneous expectations risk premium, i.e. significantly higher contract rates for loans and significantly lower output. Our stylized model illustrates how animal spirits and heterogeneous expectations may lead to a confidence loss and to financial instability amplifying the magnitude of economic crises and slowing down recovery.

Financial instability and agents' heterogeneity: a post Minskyan research agenda

This Companion provides a timely and engaging treatment of Hyman Minsky’s approach to economics, which is enjoying a renewed appreciation because of its prescient analysis of the slow but sure transformation of the capitalist economy in the post-war period. Many have called the global financial crisis that began in the United States in 2007 a ‘Minsky crisis’, and these original contributions demonstrate precisely why both academic economists as well as policymakers have turned to Minsky for guidance. The book brings together the foremost Minsky scholars to provide a comprehensive overview of his approach, with extensions to bring the analysis up to date.

Was Bernanke right? Targeting asset prices may not be a good idea after all

Should the central bank prevent “excessive” asset price dynamics or should it wait until the boom spontaneously turns into a crash and intervene only afterwards? The debate over this issue goes back at least to the exchange between Bernanke-Gertler (BG) and Cecchetti but has not settled yet. In their 1999 paper BG claimed that price stability and financial stability are ‘highly complementary and mutually consistent objectives’ in a flexible inflation targeting regime which ‘dictates that central banks ... should not respond to changes in asset prices, except insofar as they signal changes in expected inflation.’ (BG, 1999, p.18). This conclusion is straightforward within the variant of the NK-DSGE framework used by BG in which asset inflation shows up as a factor ‘augmenting’ the IS curve. In the present paper, we pursue a different modelling strategy so that, in the end, asset price dynamics will be incorporated into the NK Phillips curve. In our context it is not true anymore that by focusing on inflation the central bank is also checking an asset price boom. We put ourselves, therefore, in the best position to obtain a significant stabilizing role for asset price targeting. It turns out, however, that inflation volatility is higher in the asset price targeting case. After all, therefore, targeting asset prices may not be a good idea.

Borrowing Constraints and Monetary Policy: The Inflation Tax-Net Worth Channel

Kiyotaki and Moore’s Financial Accelerator framework (J Polit Econ 105(2):211–248, 1997, Am Econ Rev 92(2):46–50, 2002, Am Econ Rev 92(2):62–66, 2002) is the natural vehicle to explore the net worth channel of the monetary transmission mechanism. In the original model, however, all the variables, credit included, are in real terms. In order to assess the impact of monetary policy the model must be reformulated to fit a monetary economy. In the present paper we model a monetary economy with financing constraints adopting the Money In the Utility function approach. The occurrence of multiple equilibria is a likely outcome of the dynamics generated by the model. A change in the growth rate of money supply can affect real output through the impact of inflation on net worth. In this context, the monetary transmission mechanism consists of a combination of the inflation tax effect and the net worth channel.

Experiments in Macroeconomics

Expectations play a crucial role in nance, macroeconomics, monetary economics and fiscal policy. In the last decade a rapidly increasing number of laboratory experiments have been performed to study individual expectation formation, the interactions of individual forecasting rules and the aggregate macro behavior they co-create. The aim of this chapter is to provide a comprehensive literature survey on laboratory experiments on expectations in macroeconomics and finance. In particular, we discuss the extent to which expectations are rational or may be described by simple forecasting heuristics, at the individual as well as the aggregate level.

Research in Experimental Economics

Expectations play a crucial role in nance, macroeconomics, monetary economics and fiscal policy. In the last decade a rapidly increasing number of laboratory experiments have been performed to study individual expectation formation, the interactions of individual forecasting rules and the aggregate macro behavior they co-create. The aim of this chapter is to provide a comprehensive literature survey on laboratory experiments on expectations in macroeconomics and finance. In particular, we discuss the extent to which expectations are rational or may be described by simple forecasting heuristics, at the individual as well as the aggregate level.