Krugman and his wife, Robin Wells, at home with their cats, Doris Lessing and Albert Einstein.Photograph by Tina Barney When it is cold at home, or he has a couple of weeks with nothing to do but write his Times column, or when something unexpectedly stressful happens, like winning the Nobel Prize, the Princeton economist Paul Krugman and his wife, Robin Wells, go to St. Croix. Here it is warm, an
