I endogenize the probability of self-fulfilling outcomes in a game where the only uncertainty comes from extrinsic sunspots. There is a group of players wishing to coordinate on the same action and another player, the regime defender, whose action affects the payoff from coordination. The...

I develop and analyze a monetary model with liquid equity. Equity is a claim on the profits of firms acting as sellers in the search-and-matching market. Buyers in that market devote search to obtain matches with firms, and use the equity to relax a liquidity constraint. The dual nature of...

We discover sentiment-driven equilibria in popular models of imperfect risk sharing. In these equilibria, sentiment dynamics behave like uncertainty shocks, in the sense that self-fulfilled beliefs about volatility drive aggregate fluctuations. Because such fluctuations can decouple from the...

We study the global dynamics of the fully stochastic nonlinear version of the New Keynesian model and analyze the efficacy of various policies as equilibrium selection tools in this context. First, we unveil a new class of equilibria, characterized by selffulfilled beliefs about output...

We propose a model of business cycles for an economy that is characterized by involuntary unemployment and being dependent on energy imports. The presence of both factors increases aggregate volatility in a well-defined way: even in the absence of increasing returns to scale or high labor supply...

This paper demonstrates that in macroeconomic models with nominal rigidities, a global solution exists that supports an alternate equilibrium where traditional Taylor rules give rise to self-fulfilling aggregate volatility and excess risk-premium. Within the rational expectations framework, we...

We assess the quantitative relevance of expectations-driven sovereign debt crises, focusing on the Southern European crisis of the early 2010’s and the Argentine default of 2001. The source of multiplicity is the one in Calvo (1988). Key for multiplicity is an output process featuring long...

Developed economies have experienced slower growth since the 2008 Önancial crisis, creating fears of "secular stagnation." Rational expectations models have forward-looking bubble solutions, which could cause this; here we investigate the case of Japan. We show that a New Keynesian model with a...

We assess the quantitative relevance of expectations-driven sovereign debt crises, focusing on the Southern European crisis of the early 2010s and the Argentine default of 2001. The source of multiplicity is the one in Calvo (1988). Key for multiplicity is an output process featuring long...

This paper provides a theoretical approach to investigate the real effects of inflation volatility driven by a self-fulfilling prophecy (i.e., sunspot equilibrium) on investment, capital accumulation, and welfare in a representative-agent macroeconomics model. The model is constructed based on...

Models with sunspot equilibria have long been a topic of interest among economists. It then became an interesting question to ask whether there is empirical support for their existence. One approach to answer this question is through lab experiments. Such equilibria have been successfully...

A common assumption in macroeconomics is that energy prices are determined in a world-wide, rather frictionless market. This no longer seems an adequate description for the situation that much of Europe currently faces. Rather, one reading is that shortages exist in the quantity of energy...

Even if an asset has no fundamental uncertainty with a constant dividend process, a stochastic sentiment-driven equilibrium for the asset price exists besides the well-known fundamental equilibrium. Our paper constructs such sentiment-driven equilibria under general utility functions within an...

This paper shows that belief‐driven economic fluctuations are a general feature of many determinate macroeconomic models. In environments with hidden state variables, forecast‐model misspecification can break the link between indeterminacy and sunspots by establishing the existence of...

Exchange-rate models fit very well for the U.S. dollar in the 21st century. A "standard" model that includes real interest rates and a measure of expected inflation for the U.S. and the foreign country, the U.S. comprehensive trade balance, and measures of global risk and liquidity demand is...

This chapter studies how incomplete information helps accommodate frictions in coordination, leading to novel insights on the joint determination of expectations and macroeconomic outcomes. We review and synthesize recent work on global games, beauty contests, and their applications. We...

The valuation of government debt is subject to strategic uncertainty, stemming from investors' sentiments. Pessimistic lenders, fearing default, bid down the price of debt. This leaves a government with a higher debt burden, increasing the likelihood of default and thus confirming the pessimism...

William Stanley Jevons’s “Sunspot Theory” of business cycles related the number of spots on the sun to economic activity, primarily through the weather and agriculture, but also through psychological components like optimism and uncertainty. The theory is widely discredited, but John...

Even if an asset has no fundamental uncertainty with a constant dividend process, a stochastic sentiment-driven equilibrium for the asset price exists besides the well-known unique fundamental equilibrium. Our paper constructs such sentiment-driven equilibria under general utility functions...

We analyse the use of current and forward-looking data in the setting of monetary policy (Taylor rule). We answer the question of whether the use of forward-looking data is to be preferred over the use of current data. We use a behavioural macroeconomic model that generates periods of...

We study a one-sector growth model which is standard except for the presence of an externality in the production function. The set of competitive equilibria is large. It includes constant equilibria, sunspot equilibria, cyclical and chaotic equilibria, and equilibria with deterministic or...

We analyse the use of current and forward-looking data in the setting of monetary policy (Taylor rule). We answer the question of whether the use of forward-looking data is to be preferred over the use of current data. We use a behavioural macroeconomic model that generates periods of...

We study equilibrium determination in an environment where two kinds of agents have different information sets: The fully informed agents know the structure of the model and observe histories of all exogenous and endogenous variables. The less informed agents observe only a strict subset of the...

We assess whether "undue optimism" (Pigou) contributes to business cycle fluctuations. In our analysis, optimism (or pessimism) pertains to total factor productivity which determines economic activity in the long run. Optimism shocks are perceived changes in productivity which do not actually...

Exploiting a specific sunspot equilibrium in a standard forward-looking New Keynsian model, we present an example of a possible conflict between short-term price stability and financial stability. We find a conflict because the sunspot process consists of a self-fulfilling belief linking the...