Copyright 2008 Harvard Business School Publishing Corporation

Originally published in Harvard Business Review in March 1999

and January 2005

Reprint # R0501K

All rights reserved

Printed in the United States of America

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No part of this publication may be reproduced, stored in or introduced into a retrieval system, or transmitted, in any form, or by any means (electronic, mechanical, photocopying, recording, or otherwise), without the prior permission of the publisher. Requests for permission should be directed to, or mailed to Permissions, Harvard Business School Publishing, 60 Harvard Way, Boston, Massachusetts 02163.

Library of Congress Cataloging-in-Publication Data

Drucker, Peter F. (Peter ...

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