Elisabeth Schulte

Speed and quality of collective decision making: Imperfect information processing

A group of P identical managers has to make a choice between N alternatives. They benefit from reaching the decision quickly. In order to learn which is the best option, the alternatives have to be compared. A manager is able to identify the better one of two alternatives only with a certain probability. This Paper compares three different hierarchy designs with respect to decision quality: two strictly balanced hierarchies and the fastest hierarchy, which is the skip-level reporting tree proposed by Radner (1993). The latter hierarchy design is found to outperform the two others not only in terms of speed and cost but also in terms of decision quality.

Preselection and Expert Advice

We study the effects of preselection on an expert’s advice about the execution of a project if its execution yields more precise estimates about the expert’s expertise. The introduction of a preselection stage, in which the decision maker evaluates the project before asking for advice, alters the expert’s perception of the problem. We identify conditions under which preselection occurs in equilibrium. We show that if the expert adjusts his behavior, the option to preselect may reduce the expected utility of the decision maker.