Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
The demand for two custom calling services is investigated. The services may be bought individually or in a discounted package. A micro-theory based on discrete choice model is formulated that explicitly accounts for these purchase options. The model is estimated assuming both dependence and independence of the unobservable choice-influencing variables. The estimated parameters are used to simulate the revenue impact of price and discount changes. Copyright 1993 by MIT Press.