“…Moreover, few studies, except, incorporate incentive mechanisms like performance targets into the Tullock model. Our paper, which builds a multi-activity model with a target as an incentive mechanism, extends the literature on the multiple-activity Tullock competition.Second, from the perspective of performance-based promotion tournaments, this paper provides theoretical support to the previous literature, in that: (a) it helps to explain the empirical findings such asCheng et al (2022) and, which examine the existence of environmental protection behaviors and the corresponding heterogeneous responses; and , (b) it supports the empirical findings in the literature, includingGuan et al (2022),Wang et al (2020),Wang et al (2021),Wang (2021) and, which find changes in devotion to environmental protection efforts due to official evaluation system reform. One paper written byCao et al (2021) is closely related to our model, which build a theoretical model to answer how local Chinese officials respond strategically to minimum air quality control targets when they care more about pursuing regional economic development.…”