In Singapore, the virus is transmitted to humans mainly by the female Aedes aegypti mosquito, an urban-dwelling pest that lays its eggs in stagnant water.
Among the eight studies, an original research study they reference is a 2006 report assessing links between a pesticide, chlorpyrifos , and developmental delays (not diagnosed autism) in urban-dwelling families.
Opower, citing its own analysis and data from Experian, said the households are spread across 23 states but that those with Yahoo addresses tended to live in suburbia and thus inhabit bigger homes than urban-dwelling Gmailers.
Rural markets tend to be more concentrated than urban ones and the banks that served them enjoyed far higher returns than their city-dwelling counterparts.