Robert M. Hartley

Differences in ambulatory test ordering in England and America. Role of doctors' beliefs and attitudes.

B. McNeil, A. Epstein, C. Harris, 1987, The American journal of medicine.

The association of patients' socioeconomic characteristics with the length of hospital stay and hospital charges within diagnosis-related groups.

R. Stern, C. Begg, A. Epstein, 1988, The New England journal of medicine.