%0 Journal Article
%T EL EXPERIMENTO NATURAL COMO UN NUEVO DISE£¿O CUASI-EXPERIMENTAL EN INVESTIGACI¨®N SOCIAL Y DE SALUD
%A NASS KUNSTMANN
%A LILIAN
%A MERINO E
%A JOS¨¦ MANUEL
%J Ciencia y enfermer¨ªa
%D 2008
%I Scientific Electronic Library Online
%R 10.4067/S0717-95532008000200002
%X currently in social science research it is used a new research design defined as a "natural experiment", where the researcher has none participation in the treatment assignment because it has been directly done for an exogenous agent such as a law, a social policy or a natural event. this implicit exogenous intervention allows that low-level pre-determined selection bias groups be formed. therefore, the comparison on results being found between these groups (law-affected group, social policy-affected group, or natural event-affected group versus contrafactic groups not being affected) allow to predict the effect of this law, social policy, or natural event almost so efficiently like happen in randomly created treatment-and-control groups.
%K natural experiment
%K design research
%K selection bias.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0717-95532008000200002&lng=en&nrm=iso&tlng=en