Entrepreneurs are the lifeblood of the economy. They’re innovators, experimenters and risk takers, the driving force behind capitalism’s “perennial gale of creative destruction,” in economist Joseph Schumpeter’s evocative metaphor. So says Chris Farrell in this week’s Bloomberg Businessweek. But Mr. Farrell goes on to remind us that entrepreneurs are not only young, brash, rule breakers. … More Entrepreneurs. Better with age?