We study a model of financial advice where investors rely on a financial expert (the advisor) to make their asset allocation choices. There is only one source of risk and the advisor is privately informed about the volatility of the return of the risky asset. Moreover, the advisor’s...

In the presence of transactions costs, no matter how small, arbitrage activity does not necessarily render equal all riskless rates of return. When two such rates follow stochastic processes, it is not optimal immediately to arbitrage out any discrepancy that arises between them. The reason is...

I propose a general-equilibrium model with investment heterogeneity to investigate the dynamics of Tobin's q over time, and more precisely why firms tend to migrate from value to growth and viceversa. Firms are assumed to have two types of investment opportunities: i) reinvest capital in the own...