As described in Global Perspective 8-1, multinational companies wishing to tap the emerging markets are suggested to adopt a more detailed approach—a "city-cluster" approach. Basically, this approach groups cities of similar characteristics in a particular emerging market into clusters and then tailors the marketing strategy according to each cluster. Discuss the advantages and disadvantages of this approach. Do you think the ”city-cluster” approach is more effective in reaching consumers of the emerging markets? How would this approach impact company business performance and long-term sustainability?