NEW YORK — Amazon.com Inc., Berkshire Hathaway Inc. and JPMorgan Chase & Co. are publicly traded, profit-oriented corporations. So it is interesting that when they announced their new joint health-care venture this week they made a point of saying it would be “an independent company that is free from profit-making incentives and constraints.” Interesting but maybe not all that surprising: Around the world, health, life and property insurance, as well as various other financial services, have long been provided by nonprofit organizations, mostly in the form of customer-owned mutuals. From the 1960s through 2000s, wave after wave of conversions turned […]