Proposes domain‐specific market segmentation as a promising approach as compared with segmentation based on general or on brand‐specific variables. Treats product differentiation and positioning as the counterpart of market segmentation. The link between market segmentation, on the one hand,...

We analyze the structure of bilateral communication links among consumers in virtual communities by a game-theoretic model of network formation. First, link specificity is incorporated, meaning that the more direct links somebody has to maintain with others, the less she is able to specify her...