A popular argument states that most of the diversification in a portfolio can be obtained with a rather small number of securities. In this paper we present three algorithms to approach the underlying NP-hard problem of portfolio optimization with a cardinality constraint. All three of these...

Using a generalized cross-spectral approach, we propose a model-free omnibus statistical procedure to check whether the direction of changes in an economic variable is predictable using the history of its past changes. A class of separate inference procedures are also given to gauge possible...

This paper studies the corporate policy distortions caused by realization-based capital gains taxation at the personal level in a dynamic trade-off theory model. The Lock-in effect of embedded capital gains creates severe conflicts of interest between incumbent and new investors. The firm's...