We recommend at least a combination of 1st tier and 2nd tier cities, as well as 3rd tier and rural locations, if possible. On top of getting a read on geographic and demographic differences in the reactions to your products and services, lifestyle / intra-market attitudinal variations exist, so the wider you are able to carry out your research, the more comprehensive your resulting understanding of the market will be.
For large Asian markets like China and India, how many cities do we need to cover with our research?
