11.2.2 Second-degree price discrimination Second-degree price discrimination-Practice of charging different prices per unit for different quantities of the same good or service. ▣Block pricing(份段定价)-Practice of charging different prices for different quantities or "blocks"of a good. 11.2.2 Second-degree price discrimination  Second-degree price discrimination - Practice of charging different prices per unit for different quantities of the same good or service.  Block pricing (分段定价) – Practice of charging different prices for different quantities or “blocks” of a good