This paper proposes an application of standard evaluation techniques to obtain an early indication of the efficiency of a social program. An explicit distinction is made between participation and treatment since non-participants in many cases can find treatment outside of the program. By...

The matching method for treatment evaluation does not balance selective unobserved differences between treated and non-treated. We derive a simple correction term if there is an instrument that shifts the treatment probability to zero in specific cases. Within the same framework we also suggest...