Indeed, exposure to certain specific fields makes children more likely to pursue a career, and a patent, in those fields, the researchers found. This is how they know that exposure, in addition to neighborhoods, is important to innovation: It would be unlikely that growing up in a good neighborhood would inspire many children to patent in the same small field. People who grew up in Minneapolis, where there are many medical-device manufacturers, were especially likely to get patents in medical devices, for instance. Among people living in Boston as adults, those who grew up in Silicon Valley were especially likely to patent in computers. Children whose parents have patents in a specific field—say, antennas—are also likely to patent in exactly the same field as their parents did.