The malignant myth of the millennial featuring Jessica Kriegel

Despite the fuzzy definition, "our culture is currently obsessed with generational labels and the stereotypes that go with them," said Jessica Kriegel, author of Unfairly Labeled: How Your Workplace Can Benefit from Ditching Generational Stereotypes. "Although I would say that this trend of thinking differently about the younger people in our world has been prevalent for thousands of years," she added.

Kriegel said her research found most books, articles and consultants focused on Millennials rely on "an oversimplification of human behavior." She also found that they frequently contradict each other.

Those contradictions are inevitable because of the diversity within the demographic group, she said.