[Forum SIS] Riccardo Faini CEIS Seminar

[Roberto Rocci]

CEIS-Tor Vergata is pleased to inform you that, on *Friday March **12**, 
2010 at 2.30* pm, *prof.**ssa Fabrizia MEALLI** (**University of 
Florence**)* will present a paper on “*/Evaluating the effect of 
training on wages in the presence of noncompliance and missing outcome 
data <http://www.ceistorvergata.it/area.asp?a=403&oc=499&d=271>/*”.

The Seminar will be held at the Faculty of Economics, University of Rome 
"Tor Vergata", room C, 2° floor.

Please, go to www.ceistorvergata.it <http://www.ceistorvergata.it> for 
the complete list of seminars.

/ABSTRACT/

/(joint work with P. Frumento, B. Pacini, D.B. Rubin)/

/The effects of a training program on employment and wages are 
evaluated, using data from a randomized study, the National Job Corps 
Study, and the principal stratification approach to simultaneously 
address the complications of noncompliance, truncation of wages by 
nonemployment, and missing outcomes. We conduct a likelihood-based 
analysis using the theory of finite mixture models for identifiability 
and exploiting the EM algorithm. We maintain an exclusion restriction 
assumption on the outcomes but do not impose monotonicity of the 
truncation of wages. Monotonicity of compliance holds by design. We 
assess the robustness of our results by providing estimates under the 
Missing at Random assumption, as well as other nonignorable missing data 
mechanisms. The plausibility of meaningful restrictions is investigates 
by means of scaled log-likelihood ratio statistics. For compliers, 
results show that the effect on employment is generally positive; 
however, there is a subgroup of complying participants for whom the 
program is detrimental on employment in the short term, although this 
effect becomes negligible in the long term. For the subgroup of 
always-employed compliers, that is, those who would be employed whether 
trained or not, the effect of training on wages is positive in the short 
and medium term, while it becomes negligible in the long run./

Barbara Piazzi
CEIS-Tor Vergata
Facoltà di Economia
Università di Roma Tor Vergata
via Columbia, 2
00133 Roma
tel +39.06.7259.5606
fax +39.06.2020687