American Economic Journal : Applied Economics [elektronický zdroj]. American Economic Association. Available on Internet: <http://web.ebscohost.com/ehost/detail?sid=165496e5-fc73-47f6-98e5-825bd69268e4%40sessionmgr104&vid=1&hid=113&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=eoh&jid=3ANL> ISSN 1945-7782.