We present an estimated dynamic stochastic general equilibrium model of stock market bubbles and business cycles using Bayesian methods. Bubbles emerge through a positive feedback loop mechanism supported by self-fulfilling beliefs. We identify a sentiment shock that drives the movements of...

We provide a theory to investigate the implications of time-varying bailout policy for rational bubbles in an infinite-horizon production economy. In particular, we ask two questions. First, should the government bail out asset bubbles? Second, if yes, how? In our model, entrepreneurs face...

We construct a model for Bitcoin-like cryptocurrency as risky and costly bubbles in an infinite-horizon production economy with incomplete markets. This model is consistent with the following facts: i) the surging Bitcoin market presents enormous volatility, and ii) its price dynamics are...