We assess preferences of inhabitants of the island of Majorca (Spain) for the conservation of traditional, extensively reared Majorcan Black Pigs and the linked agroecosystem, using a choice experiment. Up to 35% of our respondents registered protest responses. We examine alternative methods of dealing with and accounting for these protests. We find that free allocated models report better information criteria estimates but may give rise to interpretation difficulties. Our preferred model in terms of performance and interpretability is a 3-class model where protest responses are deterministically allocated to one class and random parameters are included to account for heterogeneity. Among the non-protesting classes, we find heterogeneous preferences where 40% of the respondents are mostly concerned with management and product innovation and 24% more breed-concerned respondents favour price increases in breed-based products to fund improvement of the agroecosystem.

中文翻译：

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保护传统猪品种及其农业生态系统的社会偏好：通过确定性分配和规模扩展模型解决偏好异质性和抗议反应

我们使用选择实验评估马略卡岛（西班牙）居民对保护传统、广泛饲养的马略卡黑猪和相关农业生态系统的偏好。多达 35% 的受访者表示抗议。我们研究了处理和解释这些抗议的替代方法。我们发现免费分配的模型报告了更好的信息标准估计，但可能会导致解释困难。在性能和可解释性方面，我们首选的模型是 3 类模型，其中抗议响应被确定性地分配给一个类，并包含随机参数以解释异质性。在不抗议的阶层中，