This note extends the existing literature on speculative bubbles by allowing for arbitrary trading sequences. As our main result we prove that bubbles may exist in a myopic rational expectations equilibrium (Radner 1979) if and only if every agent expects infinitely many trading opportunities to...

In case of multiple creditors a coordination problem can arise when the borrowing firm runs into financial distress. Even if the project's value at maturity is enough to pay all creditors in full, some creditors may be tempted to foreclose on their loans. We develop a model of creditor...

I explore how investors allocate mental effort to learn about the mean return of a number of assets and I analyze how this allocation changes the portfolio selection problem. I show that the endogeneity of estimation risk alters the comparative statics of portfolio choice and provides an...

Dependent background risks which have functional forms are introduced into Lucas economies. This paper determines the conditions on preferences to guarantee the monotonicity of asset prices, when dependent background risks satisfy the monotonicity and the single crossing conditions.

We adapt a genetic-based learning classifier system to a forecast evaluation exercise by making its key parameters endogenous and taking into account the need of convergence of the learning algorithm, an issue usually neglected in the literature. Doing so, we find it hard for the algorithm to...

I explore how investors allocate mental effort to learn about the mean return of a number of assets and I analyze how this allocation changes the portfolio selection problem. I show that the endogeneity of estimation risk alters the comparative statics of portfolio choice and provides an...

Dependent background risks which have functional forms are introduced into Lucas economies. This paper determines the conditions on preferences to guarantee the monotonicity of asset prices, when dependent background risks satisfy the monotonicity and the single crossing conditions.

The paper provides restrictions on the investor's utility function which are sufficient for a dominating shift no decrease in the investment in the respective asset if there are one risk free asset and two risky assets in the portfolio. The analysis is then confined to portfolio in which the...

In case of multiple creditors a coordination problem can arise when the borrowing firm runs into financial distress. Even if the project's value at maturity is enough to pay all creditors in full, some creditors may be tempted to foreclose on their loans. We develop a model of creditor...

The paper provides restrictions on the investor's utility function which are sufficient for a dominating shift no decrease in the investment in the respective asset if there are one risk free asset and two risky assets in the portfolio. The analysis is then confined to portfolio in which the...