Figure 1

Different types of network construction: (a) simplest: ON = 2, CN = 2, IN = 1, (b) increased link in interaction network: ON = 2, CN = 2, IN = 3, (c) increased link in citizens network: ON = 2, CN = 4, IN = 1. Officer strategies are: O1 (honest: does not demand bribe) and O2 (corrupt: demands bribe) and citizen strategies are: C1 (apathetic: pay silently), C2 (conscientious: pays but complains) and C3 (honest: refuse to pay and complains).