  In system dynamics, the concept of loop impact measures the effect of a
feedback loop on the curvature in the behaviour of the stocks in the loop
(Hayward & Boswell, 2014). It is a ratio measure of the acceleration imparted
by the loop into a stock and can also be thought of as a ratio measure of the
force exerted between adjacent stocks in the loop (Hayward & Roach, 2017). As
such, a loop of n stocks is described by n impacts. Loop impact is used to
examine regions of loop dominance in stock behaviour. Sometimes, it is helpful
to present a dominance analysis for a complete system rather than an individual
stock. This paper introduces the concept of average loop impact to explore such
a system-wide loop dominance analysis.
