Huber, Martin; Lechner, Michael; Wunsch, Conny; Walter, … - 2009
.
Welfare research has traditionally focused on the USA, see for instance Grogger (2003), who
investigates the effect of time … substantial human capital investment and focuses on the
adaption of the professional skills and qualifications of participants to … (implicitly or explic-
itly) built on the principle that for every comparison of two programmes and for every
participant in one …