TY - GEN AU - O'Sullivan, Arthur. AU - Sheffrin Steven M TI - Economics: principles and tools SN - 0132063689 (alk. paper) AV - HB171.5 U1 - 330 21 PY - 1998/// CY - Upper Saddle River, N.J. PB - Prentice Hall KW - Economics N1 - Includes bibliographical references and index ER -