This paper presents a general model for approaching the problem of control of the active collection of a library through the acquisition and weeding processes. It assumes that age of book and size of holding are important in this process and recognizes constraints related to shelf space and the...

Authors' reply to Sandison A. 1977. Communication--Modelling library collections. Management Sci. 24 (1) 113-114.

A mathematical model is developed for a marketing situation with two competitors when each competitor has two control variables, viz. price and promotional effort. The model discussed in this paper is an extension of Mills' model [Bass, Frank M., Buzzell, Robert D., Greene, Mark R., Lazer,...

Long-range investment plans, particularly for expansion or decentralization, often consist of a number of separate but interacting investments spaced over a number of years. Where there is appreciable uncertainty about external conditions in the future, it is possible that a "best" scheme based...