In his opinion, building comparative analyses of criminal justice policy around the rigorousness of the different national crime control systems has a number of significant shortcomings, at both the theoretical (because its ideological context is too scant) and the methodological level (because the indicators used are too limited).
Díez-Ripollés proposes to conduct comparative analyses of criminal justice policy based on the differentated capacity of the national crime control system to minimise the social exclusion of the individuals who enter into conflict with criminal law. This entails evaluating the system’s ability to obtain, recover, consolidate, or at least not deteriorate, an acceptable level of social inclusion for suspects, offenders and ex-offenders.