This summer Brother Andrew O’Brien, DKE Rho’s President, is doing EXCEL research with an economics professor on campus. As such, Brother O’Brien is modeling the United States phone market using an agent based modeling program called NetLogo. The model investigates how technological changes and product differentiation are affected by entry costs into the market. The purpose of the model is to explore the environmental implications of cell phone batteries. The model is used to investigate how deposit fees and nuisance costs affect the number of phones recycled by consumers.