9781464143847_TestBank_Chapter-01-First-Principles.rtf 9781464143847_TestBank_Chapter-01-First-Principles.rtf administrator Test Bank: Economics, 4th Edition, Paul Krugman, Robin Wells, ISBN-10: 1-4641-4384-6, ISBN-13: 978-1-4641-4384-7, ISBN-10: 1464143846, ISBN-13: 9781464143847, ISBN-10: 1319035876, ISBN-13: 9781319035877