Channel coordination in search advertising is an important but complicated managerial decision for both manufacturers and retailers. Due to the highly concentrated market of search advertising, a manufacturer's and its retailers' ads can compete instead of complement with each other. We consider...

In this paper, we consider the fixed-sample and sequential strategies in group search, and we break the conventional wisdom that the sequential search strategy always dominates the fixed-sample strategy. We model group search as a game among group members, and we show that the fixed-sample...