Complex sentence: This approach is relatively pervasive in the United States, the record-keeping does not adequately collect data on the socioeconomic status of offenders which, in turn, makes research and policy evaluation problematic.
Split into simpler sentences: This approach is relatively pervasive in the United States. The record-keeping does not adequately collect data on the socioeconomic status of offenders which, in turn, makes research and policy evaluation problematic.