Before revision:  When each buyer observes an unboundedly informative private signal about the seller's current-period action, the speed of learning is uniformly bounded  below and a patient seller can secure high returns from building reputations.
After revision:  When each buyer observes an unboundedly informative private signal about the seller's current-period action, the speed of learning is uniformly bounded from below and a patient seller can secure high returns from building reputations.