optimal counterterrorism and its consequences when large terrorist attacks lead to a temporary increase in terrorist … recruitment. First, we show that an increase in counterterrorism makes it more likely that terrorist cells plan small rather than … large attacks and therefore may increase the probability of a successful attack. Analyzing optimal counterterrorism we see …

counterterrorism. Game theory has been used to examine the interaction among targeted governments, the interface between factions … identifies a host of externalities and their strategic implications for counterterrorism policies. In addition, the chapter … borders). For counterterrorism, we use normal-form games to distinguish proactive from defensive policies. Although both …

over-investing in offensive measures. Policy implications are discussed in light of recent US counterterrorism experience …