ABSTRACT
Most of those interventions consist of public assessment oriented to help enterprises to improve their safety management systems. In the literature they are known as “Planes de Actuación Preferente” or simply as PAP (Rodrigo et al., 2007; Benavides et al., 2009). So far the analysis of PAP programs has been done with the injury rate analysis (López-Ruiz et al. 2013) but bias on selection of the enterprises participating is a serious threat for the internal validity of the results.
