Every year sometime after Thanksgiving, my clothes shrink. My newest suit coat no longer buttons, and the pleats of the pants pull tight. This is confusing, because in my mind’s eye, I’m still the lean, mean, fighting machine who completed Army basic training in 1971. The truth is that my clothes are the same size, but the body the fabric must cover has grown and reshaped.

MANAGEMENT AND LEADERSHIP Management implies the existence of formal authority, while leadership may not have any connection with formal authority. Marketing managers are in their...