The 2015 article is a Quartz interview with (2017 Nobel Prize in Economics Winner) Richard Thaler by Thomas MacMillan) and the last question and answer read:

Is economics about establishing the facts?

You know, it should start with that. In the end of the book I have this somewhat snide call for empirically based economics, evidence-based economics. One could reasonably ask, “What other kind of economics could there be?”

Richard Thaler on misbehavior, tipping, and economists as failed mathematicians

Richard Thaler spent most of his career as an academic outsider. And along the way, he became one of the founding fathers of a once-obscure blend of psychology and economics that we now know as behavioral economics. An economics professor at the University of Chicago Booth School of Business, Thaler is now president of the…