Author: Jordan Birnbaum -- As a behavioral economist working in human capital management, I've witnessed how the concept of employee engagement has shifted among employers, from a "nice-to-have" to a "need-to-have." Where in the past engagement might have been considered a "soft" luxury among business managers and HR leaders, today, they recognize that engagement drives hard business metrics. What caused this shift in perception? Well, hard data of course. Statistically...