some eminent economists believe that over a long period of years, after allowance is made for all losses, for a minimum “riskless” interest on invested capital, and for an imputed “reasonable” wage value of the services of people who run their own business, no net profit at all may be left over, and that there may even be a net loss. This is not at all because entrepreneurs (people who go into business for themselves) are intentional philanthropists, but because their optimism and self-confidence too often lead them into ventures that do not or cannot succeed.
