I suspect there are fundamental limits to what one can predict using a rear view mirror. Still there are good reasons economists are fad prone and they are pure

I suspect there are fundamental limits to what one can predict using a rear view mirror. Still there are good reasons economists are fad prone and they are purely economic: - first mover advantage. You establish a new way of doing things. Others pile in. Your investment goes up. - marketing. Your chances to stand out and as employee attract management attention or if you are a fund attract more money to manage is a powerful incentive.