xBookUtils.terms['fn_11_501'] = "The IS–LM model was introduced in a classic article by the Nobel Prize–winning economist John R. Hicks, “Mr. Keynes and the Classics: A Suggested Interpretation,” Econometrica 5 (1937): 147–159.";
xBookUtils.terms['fn_11_502'] = "Mathematical note: We prove this algebraic result as follows. For |x| < 1, let