tag:blogger.com,1999:blog-2830084253401570472.post2101541789439041808..comments2024-03-28T09:22:36.967+13:00Comments on Offsetting Behaviour: Needs a diff-in-diffEric Cramptonhttp://www.blogger.com/profile/15831696523324469713noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-2830084253401570472.post-33208193898447116072015-01-22T09:52:44.792+13:002015-01-22T09:52:44.792+13:00Yup. Another reason you need the difference-in-dif...Yup. Another reason you need the difference-in-difference analysis to distinguish policy effects from whatever the heck's driving the time trend.Eric Cramptonhttp://offsettingbehaviour.blogspot.com/noreply@blogger.comtag:blogger.com,1999:blog-2830084253401570472.post-56779467069054441642015-01-21T21:20:24.998+13:002015-01-21T21:20:24.998+13:00The other thing about this drop is that it is part...The other thing about this drop is that it is part of a world wide phenomenon. This suggests that local changes (eg to benefit entitlements), unless they are part of a worldwide move in that direction, is unlikely to be the cause.<br /><br />There are also worldwide trends in other youth behaviour - they are drinking less, having less (and later) sex, and getting into trouble with the law less, and I would have thought that these are all related.<br /><br />I think that social workers and health professionals love to ascribe the change to their birth control. It makes them feel Wanted and Needed and Useful. I wouldn't put any reliance on this attribution without that old bugbear of all public servants -- hard evidence.Marynoreply@blogger.com