Incidental trips and aquarium benefits

This recreation demand study empirically tests the complementary nature of destination travel and single-day trips. Day-trips to North Carolina aquari ums are treated as incidental to the primary destination trips to the North Carolina coast. Visitors would not have taken day-trips if the primary pur poses of the vacation trips had not been taken first. Applying the individu al travel cost method, a demand function is estimated with Poisson regressi on. The consumer surplus is $21.73 per aquarium trip.