Model Ekonomi Pengendalian Daya Rusak Air Tanah di Kota Semarang: Pendekatan Game Theory dan Eksperimen Ekonomi

Groundwater abstraction in Semarang City is thought to have triggered land subsidence and sea water intrusion. This research models the behavior of groundwater users through economic experiments using Prisoner's Dilemma Game. The experimental design is a 23 factorial design. The independent variables or factors are payoff, framing, and communication, while the response variable is the level of cooperation. The G statistic shows a significant logit equation model. Wald statistic shows a significant framing factor, whereas communication factor, framing and communication interaction factor, all factors interaction are significant but with the opposite sign. The McNemar change test and the Fisher exact test for 2 × 2 tables confirm the results of multinomial logistic regression analysis.The study implies a policy based on the treatment proxy in experiments. First, narating the depletion and the role of groundwater users is narated. Second, building trust before implementing information disclosure on groundwater use. Third, determining groundwater extraction fines after internalizing scarcity rent in groundwater prices calculation.