Portfolio Selection with Time Constraints and a Rational Explanation of Insufficient Diversification and Excessive Trading

a comparison of teachers and supervisors, with respect to teacher efficacy and reflection

supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...

Illiquidity, Portfolio Constraints, and Diversification *

Asset Selection and Under-Diversification with Financial Constraints and Income: Implications for Household Portfolio Studies

Asset Selection and Under-Diversification with Financial Constraints and Income: Implications for Household Portfolio Studies

Empirical studies of household portfolios have shown that young and relatively poor households hold under-diversified portfolios that are concentrated in a small number of assets, a fact often attributed to various behavioral biases. We present a model that offers a potential rational alternative: we show that relatively poor investors; i.e., investors with little financial wealth, who receive ...

Randomized Portfolio Selection, with Constraints

In this paper we propose to deal with the combinatorial difficulties in mean-variance portfolio selection, caused by various side constraints, by means of randomization. As examples of such side constraints, we consider in this paper the following two models. In the first model, an investor is interested in a small, compact portfolio, in the sense that it involves only a small number of securit...