Frequently I’m asked if I can produce research that proves employee engagement affects economic profits. My answer: social science research can’t prove it with certainty but the sheer amount of evidence makes it “beyond a reasonable doubt” that some causation exists. The challenge with social science research is that it’s impossible to isolate the effect of one factor. To get a sense for some of the supporting research, take a look at these links to research summaries from Winning Workplaces and DDI (see “Building the Business Case” on pages 5-6).