We study the evolution of prices in markets assisted by price-comparison engines. We use laboratory data obtained under two industry sizes and two conditions concerning the sample (complete, incomplete) of prices available to informed consumers. Distributions are typically bimodal. One of the...

In a four-treatment experiment, we test some of the hypotheses inGarcia-Gallego et al.(2004) concerning competition among a number offirms of which some (or all) are indexed by a price-comparison enginefacilitating buyers' search process. In this paper, we isolateindividual behavior from noise...