HBR’s 90th anniversary seems like a good time to back up and ask a basic question: Are organizations more likely to succeed if they adopt good management practices? For a decade we’ve been conducting research to find out. That may seem like a foolish endeavor—isn’t the obvious answer yes? But as classically trained economists, we believe in reexamining long-held assumptions to see whether they stand the test of time.

A version of this article appeared in the November 2012 issue of Harvard Business Review.