The criteria for &quot;major depression&quot; have been broadened, so more people are included.<p>Here&#x27;s a recent paper talking about placebo and anti-depressants.<p><a href="http:&#x2F;&#x2F;onlinelibrary.wiley.com&#x2F;doi&#x2F;10.1002&#x2F;wps.20241&#x2F;abstract" rel="nofollow">http:&#x2F;&#x2F;onlinelibrary.wiley.com&#x2F;doi&#x2F;10.1002&#x2F;wps.20241&#x2F;abstrac...</a>