Vol. 3, Issue 8, Part L (2017)

Abstract
This paper is designed to introduce social scientists to the fundamental concepts and uses of stochastic differential equations, as applied to several models of current interest: linear feedback, epidemics, and the cusp catastrophe. The approach taken here is to focus on the stationary probability density function of the model, which avoids most of the advanced mathematical techniques that are ordinarily required to describe the solutions of the equations.