Who wants to swim at a beach with multiple recent shark attacks? In Jaws (1975), Mayor Vaughn knows that if word of the attacks gets out and the beaches shut down, it will cripple the local tourist economy of Amity Island. Tourists will choose other safer places to stay, and businesses will not want to invest in the area if it has become an undesirable vacation spot. If there is a shark terrorizing the local beaches, there is likely to be a decline in consumer and business confidence in the town causing the aggregate demand curve to decline.
Thanks to Amanda Mandzik for the clip submission & summary.