In this article, the author provides a simple characterization of retailer
response to manufacturer trade deals in terms of the consumer demand condit
ions that the retailer faces. Specifically, the author shows conditions on
the curvature of consumer demand functions that make it optimal for a profi
t-maximizing retailer to pass through greater (less) than 100% of the trade
deal amount it gets from a manufacturer, Using these conditions, the autho
r demonstrates that whereas the linear and all concave consumer demand func
tions lead to less than 100% optimal retail pass-through, there exists a su
bset of convex consumer demand functions for which a retailer rationally en
gages in greater than 100% pass-through. This subset contains many commonly
used demand functions, such as the constant elasticity demand function, th
e negative exponential demand function, and many other varying elasticity d
emand functions.