An increasing number of firms have integrated beyond traditional retai
ler-wholesaler boundaries and now sell the same product through two or
more structurally different channel systems. As a result, the histori
cally synonymous definitions for trade and functional price discounts
are becoming obsolete. If regulatory agencies continue to use these ob
solete definitions, enforcement of the Robinson-Patman Act becomes con
fused and distributive innovation is inhibited A price discount's defi
nition determines who is (and is not) entitled to the discount, so the
definition is a key starting point for analyzing a discount's competi
tive effect, which is the primary lest under the Robinson-Patman Act.
Regulatory agencies should be conscious of the pro-competitive effects
of price discounts and follow an enforcement policy that encourages b
oth competition and innovation. The authors clarify trade and function
al price discount terminology, discuss the role those discounts play i
n developing more efficient channel systems, review the existing defen
ses to price discrimination charges, and conclude with a recommendatio
n for an explicitly recognized availability defense for these types of
channel-based price discounts.