Dreher, Axel (contributor); Walter, Stefanie (contributor) - 2008
, Bird 2007, Steinwand and Stone
2008).
In face of this abundance of studies, it is surprising that few studies have … is on implemented conditions,
however. Many studies have shown that non-compliance and program interruptions are quite … studies pursue either some variant of Heckman’s (1979)
estimator or an instrumental variables approach; recently the method …