This work is published under the responsibility of the Secretary-General of the OECD. The opinions expressed and arguments employed herein do not necessarily reflect the official views of OECD member countries.
Photo credits Cover © LuminaStock/iStock; © Dean Mitchell/iStock; © bo1982/iStock; © karandaev/iStock; © IA98/Shutterstock; © Tupungato/Shutterstock.
Corrigenda to OECD publications may be found at: https://www.oecd.org/en/publications/support/corrigenda.html.
© OECD 2019
The use of this work, whether digital or print, is governed by the Terms and Conditions to be found at https://www.oecd.org/termsandconditions.