AUTHOR=Layard Richard , Clark David M. TITLE=Why More Psychological Therapy Would Cost Nothing JOURNAL=Frontiers in Psychology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2015.01713 DOI=10.3389/fpsyg.2015.01713 ISSN=1664-1078