TY - JOUR AB - Article PDF first page preview Close This content is only available as a PDF. © 1990 The Review of Economic Studies Limited TI - Index JO - The Review of Economic Studies DO - 10.1093/restud/57.4.711 DA - 1990-10-01 UR - https://www.deepdyve.com/lp/oxford-university-press/index-0JWQ3OuY3X SP - 711 EP - 713 VL - 57 IS - 4 DP - DeepDyve ER -