American Economic Journal : [elektronický zdroj]. American Economic Association. Available on Internet: <http://web.ebscohost.com/ehost/detail?sid=e7b4b630-9f2b-41a5-a06c-114c7d0b0e7f%40sessionmgr104&vid=1&hid=113&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=eoh&jid=3ANJ> ISSN 1945-7669.