[Forum SIS] Seminario Prof.ssa Mealli

[Dip. Scienze Statistiche - Mi]

Il Dipartimento di Scienze Statistiche dell'Università Cattolica del Sacro Cuore ha organizzato un seminario, presentato dalla Prof.ssa Fabrizia MEALLI, dell'Università di Firenze, dal titolo:



Using secondary outcomes and covariates to sharpen inference in randomized experiments with noncompliance



Giovedì 22 Novembre dalle ore 11,00

in Aula G 153



Università Cattolica del Sacro Cuore - Milano

Largo Gemelli,1 Edificio Lanzone 18

Abstract:

We develop new methods for analyzing randomized experiments with noncompliance and, by extension, instrumental variable settings, when the often controversial but key exclusion restriction assumption is violated.

We show how existing large sample bounds on intention-to-treat effects for the subpopulations of compliers, never-takers and always-takers can be tightened by exploiting  the joint distribution of the outcome of interest with a secondary outcome, for which the exclusion restriction is satisfied, or with a pretreatment variable.

The derived bounds can be used to detect violations of the exclusion restriction and the magnitude of these violations in instrumental variables settings. It is shown that the reduced width of the bounds depends on the strength of the association of the auxiliary variable with the primary outcome and the compliance status. We also show how the setup we consider offers new identifying assumptions of intention-to-treat effects. The role of the auxiliary information is shown in two examples of a real social job training experiment and a simulated medical randomized encouragement study. We also discuss issues of inference in finite samples and show how to conduct Bayesian analysis in partial and point identified settings.





Si prega di confermare la propria presenza inviando una e-mail a: dip.scienzestatistiche at unicatt.it<mailto:dip.scienzestatistiche at unicatt.it>
Il seminario è gratuito, ma l'iscrizione necessaria ai fini organizzativi.

Grazie
Segreteria Organizzativa:
Barbara Villa
Addetto Amministrativo Segreteria
Dipartimento di Scienze statistiche
Università Cattolica del Sacro Cuore
Largo Gemelli, 1
Edificio Via Lanzone, 18
20123 Milano
Tel. 02/72342647
Fax 02/72343064
http://dipartimenti.unicatt.it/scienze_statistiche


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