Members of the millennial generation are far less trusting than baby boomers or Generation X. Also, unlike their older counterparts, millennials are far more likely to rely on technology to make informed decisions. As director of the undergraduate marketing program at Wharton, adjunct professor Keith Niedermeier has specific insight into this group: He’s been teaching a core marketing course to millennials since they started college about 18 years ago. Recently, Niedermeier spoke to Wharton marketing professor Barbara Kahn about the unique characteristics of millennials and the profound changes taking place in mass marketing, advertising and messaging. The interview took place on Wharton’s Marketing Matters radio show, which airs on  SiriusXM channel 111 . (Listen to the full podcast using the player above.) The following are key insights from the conversation: Millennials are defined by digital. Generational studies point to common factors that create and define a cohort.…