Two kinds of odors are being looked at, the kind that come from the products themselves, and the unrelated odors that surround a buyer—intentional or not. A Canadian researcher and his team found that citrus smells increased sales, as well as the perception that the store's products were high quality. Coach (handbags) and Sony are both said to be experimenting with sensory branding in their stores. The researcher warns, however, that it's a complex equation of layering, which can backfire if a scent clashes with other scents in the retail environment.
Source: www.theprovince.com