. Within this setting, we study four types of price-fixing agreement: (i) a segment-wide cartel in the premium submarket only …, (ii) a segment-wide cartel in the standard submarket only, (iii) two segment-wide cartels, and (iv) an industrywide cartel …-wide cartel prefers to maintain market shares at pre-collusive levels. The impact on consumer and social welfare critically …

proliferating their products. It is shown that a selective pruning within the cartel always occurs. Moreover, by associating a … cooperative (or coalitional) stability of the whole industry cartel is the equidistance of firms’ products along the quality …

parameter that determines firms' market strategies. We study collusion in a quality-differentiated duopoly and we adopt a Nash … more likely to leave the cartel for small quality differences, high quality firms determine cartel stability when the …