Preface

This is a final report of a project. It has been formally reviewed but has not been formally edited. 20010808 063 RAND is a nonprofit institution that helps improve policy and dccisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions or policies of its research sponsors. © Copyright 2001 RAND All rights reserved. No part of this book may be reproduced in any form by any electronic or mechanical means (including photocopying, recording, or information storage and retrieval) without permission in writing from RAND. Published 2001 by RAN