given period, after having observed her income, the agent can walk away from the contract, while the intermediary cannot, i … intermediaries. Insurance can be provided because in an equilibrium contract an up-front payment effectively locks in the agent with … an intermediary. We then show that our contract economy is equivalent to a consumption-savings economy with one …

Estimation of the volatility of time series has taken off since the introduction of the GARCH and stochastic volatility … unobserved stochastic volatility, and the varying approaches that have been taken for such estimation.In order to simplify the … comprehension of these estimation methods, the main methods for estimating stochastic volatility are discussed, with focus on their …