title: What proportion of hospital cost differences is justifiable?
authors: RAND, Santa Monica CA 90406.
authors: E B
authors: EB
authors: Keeler
mesh_terms: D003365:Costs and Cost Analysis / Q000379:methods*; D004469:Economics, Hospital / Q000706:statistics & numerical data*; D006278:Medicare; D008722:Methods; D011445:Prospective Payment System; D011907:Rate Setting and Review / Q000379:methods; D012720:Severity of Illness Index; D014481:United States