available at amazon online a Xmas gift I just finished reading. I can't remember if I learned this at art school -- probably not, neither of the art schools I attended ever discussed, gasp, the business of art (other than one forthright guest speaker, Alex Colville) but that impressionist gang (Manet, Monet, Pissarro, Degas, Renoir, Sisley, Morisot, Cassatt, Cezanne) was a pretty impressive gang of entrepreneurs. Like Judy Garland +Mickey Rooney, when they needed money, they put on a show. After show, after show. And stuck together, for the most part (okay, not Manet so much), helping each other out financially, psychologically + emotionally.
It made me most envious. It would be great to break out of the Group of One syndrome....