American Economic Journal : [elektronický zdroj]. American Economic Association. Available on Internet: <http://web.ebscohost.com/ehost/detail?sid=f04864dc-6c47-432b-8390-9f4b186e6b0b%40sessionmgr110&vid=1&hid=113&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=eoh&jid=3ANK> ISSN 1945-7731.