The theoretical results are mixed at best. Linear systems do not show novel behavior. Some non-linear models may show new growth modes as revealed by formulas for the eigenvalues of the linearized versions of such models. The new growth modes shown by a reduced-order version of the Commodity Cycle model (Meadows, 1970) suggest that this non-linear model may support novel behavior in some regimes of operation. This paper partially lays to rest that expectation.