Description: Article from The Actuary, May 1971 – volume 5 - Issue 5 is a book review of Jay W. Forrester's Urban Dynamics which presents a mathematical model of a city and uses it to study the effects of various urban improvement programs.

Description: This article introduces the reader to probabilistic methods used to model interactions in the financial market place. Three topics are specifically discussed, two concern modeling methods and the other concerns data analysis methods.