Dr. Williamson’s work often returned to the ‘‘make or buy’’ problem, which he called ‘‘a simple case’’ that could be used to ‘‘understand more complex cases,’’ from the negotiation of labor contracts to the privatization of industries. 7:58 p.m.
Nancy Stark Smith didn’t care much for dance as a child and teenager. In a talk she gave in 2005 about contact improvisation — the vigorous movement form of which she was a founding member — she said: “I’d see the dancers standing in front of a wall of mirrors looking at themselves and making little movements. 7:37 p.m.
Ms. Amos, an acclaimed figurative artist whose high-color paintings of women flying or falling through space were charged with racial and feminist politics, died May 21 at her home in Bedford, N.H. 7:11 p.m.