In the case of internal auditors, the population considered was made up of those discharging their functions in
Spanish municipalities from 20,000 inhabitants onwards. The establishment of a bottom limit at the level of
20,000 inhabitants is founded on the fact that that is the size determined by Spanish local regulations (LRBRL,
art. 26) from which councils have to deliver social services in a compulsory way. At the same time, the authors
considered that councils under that size would not have enough resources to accomplish an effective internal
control on their performance, at least on the terms required by Spanish Law.