Using RPL model to probe trade-offs among negative externalities of controlling invasive species.
This empirical study uses the choice experiment method to analyze the preferences of national park (NP) visitors regarding the negative externalities of NP measures to prevent and control invasive alien species (IAS). In addition, it estimates the visitor responses to the trade-offs between various negative externalities and the prices visitors are willing to pay. Based on these trade-offs and the willing-to-pay prices, NPs can plan IAS prevention that has the least impact on visitors. Adopting visitors to Taiwan's Shei-Pa National Park as the survey respondents, this paper uses a stratified random sampling method to select the survey time and applies systematic sampling to select respondents during the survey period. A total of 602 questionnaires and 2998 observations were obtained. The results reveal that visitors believe that the negative externalities of IAS have a significant impact on them. However, their preference for prevention and control outweighs their preference for no prevention and control measures. In terms of the negative externalities associated with IAS prevention and control, visitors award priority to avoidance of ecological disturbance and harm to visitor health, and are more likely to accept the reduction of recreational area.