Abstract This paper has two objectives. The first is to estimate the value of implementing new coastal and marine conservation measures in Vietnam, focussing on the relative benefits of water quality improvements, coral conservation and control of marine plastic pollution. The second is to explicitly model any tendency of respondents to fail to give consideration to the “opt-out” or status quo option in a choice experiment, due to social and cultural factors. The analysis employs the independent availability logit model with random coefficients to simultaneously account for heterogeneity of preferences and choice set formation. Results show significantly improved model fit when consideration set heterogeneity is taken into account. However, estimates of preference weights and marginal willingness to pay for marine conservation measures are unaffected by this modelling choice.

中文翻译：

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越南沿海和海洋保护的偏好：考虑个人选择集形成的差异

摘要 本文有两个目的。首先是评估在越南实施新的沿海和海洋保护措施的价值，重点关注水质改善、珊瑚保护和海洋塑料污染控制的相对效益。第二个是明确模拟受访者由于社会和文化因素而未能在选择实验中考虑“选择退出”或现状选项的任何趋势。该分析采用具有随机系数的独立可用性 logit 模型来同时考虑偏好和选择集形成的异质性。结果显示，当考虑集合异质性时，模型拟合得到显着改善。然而，