  In models of cosmological inflation motivated by dynamical supersymmetry
breaking, the potential driving inflation may be characterized by inverse
powers of a scalar field. These models produce observables similar to those
typical of the hybrid inflation scenario: negligible production of tensor
(gravitational wave) modes, and a blue scalar spectral index. In this short
note, we show that, unlike standard hybrid inflation models, dynamical
supersymmetric inflation (DSI) predicts a measurable deviation from a power-law
spectrum of fluctuations, with a variation in the scalar spectral index $|dn /
d(\ln k)|$ may be as large as 0.05. DSI can be observationally distinguished
from other hybrid models with cosmic microwave background measurements of the
planned sensitivity of the ESA's Planck Surveyor.
