“…This paper significantly extends the analysis in Cater, Lew, and Smith (), who examine a related but much simpler model that abstracts from all questions related to effort, incentives, knowledge decay, and heterogeneity in ability, research output, and compensation. That paper offers only a limited solution to Question 1 that holds only under very strict and unrealistic conditions, and it provides no answers to Questions 2, 3, and 4.…”