We introduce a collective experimentation problem where a continuum of agents choose the timing of irreversible actions under uncertainty and where public feedback from the actions arrives gradually over time. The leading application is the adoption of new technologies. The socially optimal...

In this article, we present a procedure for obtaining an optimal solution to the Markowitz's mean-variance portfolio selection problem based on the analytical solution developed in a previous research that lead to the emergence of an important model known as the Black Model. The procedure is...

In this paper we address the hard problem of search. Search is a pervasive phenomenon of biological and economic life. But search is hard—especially in uncertain and dynamic environments. We develop a generalized form of question-answer probing as a way of simplifying search, with implications...