测量森林资源价值:作为公众参与工具的选择实验和偏好构建方法的评估

B. Shapansky, W. Adamowicz, P. Boxall
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引用次数: 12

摘要

森林产生的人类价值包括市场价值和非市场价值。木材价值和在市场上交易的非木材林产品(浆果、野生大米等)的价值被视为市场价值。在非市场价值中,有娱乐价值和与土著居民采集野生动物有关的价值。这些被认为是非市场的,因为参与这些活动不需要购买基于市场的许可证;在这些活动中,价格不起配给机制的作用。除了活动产生的非市场价值外,个人也可能具有与森林条件(生物多样性等)有关的价值。这些价值被称为被动使用价值,因为这些价值与与森林有关的资源或活动的任何具体使用无关。由于加拿大的森林大部分在公共土地上,这些被动利用价值与加拿大森林管理特别相关。这些价值揭示了公众对森林管理组成部分的偏好。得出这些价值是公众参与的一种形式,因为公众参与评估森林管理备选方案,并就这些备选方案提出意见和看法。理想的情况是,从广泛的公众中收集森林产生的价值,并加以审查,以便为森林管理人员提供指导。但是,当人们对森林生态和管理的范围和复杂性缺乏经验时,对森林产出和条件的价值可能形成得很差。此外,在没有权衡的情况下获取价值可能会导致误导性的估计。在这个项目中,我们试图通过一种被称为偏好构建的方法,以一种允许模糊定义的初始价值概念的方式来引出被动使用价值。偏好建构本质上是为被动使用价值的发展提供教育和信息处理。这些估计也是通过权衡方法(选择实验)得出的。该项目侧重于NorSask森林中当地公众的价值观。更正式地说,本研究的目标是:1)确定当地居民与NorSask森林管理许可区内森林相关的被动使用价值;2)根据正式偏好建构练习的程度和频率,探讨偏好的差异;3)评估这种方法作为一种公众参与的方法。共有43名来自当地社区的人士参与了估价工作。他们参加了三组或治疗,每组在评估评估中的参与程度不同。第一组参与了三个独立的会议,允许重要的偏好构建和信息获取。第二组只参与了一次会议,第三组只通过电话联系和通过邮件完成了一项调查,最低限度地参与了会议。被检验的假设是,参与练习的程度会影响反应,要么是反应的差异,要么是实际的偏好。并非所有的森林价值都可以在一次估价任务中加以审查。在这种情况下,评估了与关键狩猎物种(驼鹿)、反映生物多样性的野生动物物种或受威胁物种(驯鹿)、森林、保护区和当地就业相关的价值。这些是根据与第一组的偏好构建会话选择的。在森林价值的排名中发现了一个总的趋势。较老的林龄等级和保护区的增长值最高,而驯鹿和驼鹿的增长值较低(以相对于当前水平的百分比变化表示)。最低价值来自林业活动创造的当地就业机会。还制定了这些价值的货币衡量标准。个体做出的情景选择显示,驼鹿和北美驯鹿数量增加5%每年的价值约为10美元和12美元。老年班或保护区增加5%的价值大约是原来的4到5倍。他们愿意为当地就业的增加每年支付大约7美元的增税。关于群体偏好不同的假设没有被接受。第一组和第三组的偏好,虽然被认为是非常不同的,但实际上非常相似。第二组确实看起来与前两组不同,但可能是人口特征的显著变化导致了这种差异,而不是偏好构建努力的水平。然而,第三组的样本对完成练习表现出更大的阻力,并对价值评估提出了更多的抗议。总之,所采用的方法成功地为森林管理的组成部分带来了被动利用价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
MEASURING FOREST RESOURCE VALUES: AN ASSESSMENT OF CHOICE EXPERIMENTS AND PREFERENCE CONSTRUCTION METHODS AS PUBLIC INVOLVEMENT TOOLS
Human values arising from forests include market and non-market values. Timber values and values of non-timber forest products traded in markets (berries, wild rice, etc.) are considered market values. Among non-market values are recreation values and values associated with wildlife harvesting by Aboriginal People. These are considered non-market because participation in these activities does not require the purchase of market based permits; prices do not function as rationing devices in these activities. In addition to non-market values arising from activities, individuals may also have values associated with forest conditions (biodiversity, etc.). These are referred to as passive use values since the value is not associated with any specific use of the resource or activity related to the forest. Since forests in Canada are largely on public land, these passive use values are particularly relevant to Canadian forest management. These values reveal the preferences of the public for components of forest management. Eliciting these values is a form of public involvement in that the public is engaged in assessing forest management options and providing opinions and sentiments regarding these options. Ideally, values arising from forests would be collected from a broad range of the public and examined to provide guidance to forest managers. However, values over forest outputs and conditions may be very poorly formed when people have little experience with the range and complexity of forest ecology and management. In addition, eliciting values without framing them in a trade-off setting can result in misleading estimates. In this project we attempt to elicit passive use values in a manner that allows for poorly defined initial notions of value through an approach known as preference construction. Preference construction essentially provides for education and information processing in the development of passive use values. These estimates are also developed using a trade-off approach (choice experiments). The project focuses on the values of the local public within the NorSask forest. More formally, the objectives of this research are to: 1) ascertain the passive use values held by local people associated with forests in the NorSask Forest Management License Area; 2) explore differences in preferences based on the degree and frequency of formal preference construction exercises; and 3) evaluate this approach as a method of public involvement. A total of 43 individuals from the local community were involved in the valuation exercise. They participated in 3 groups or treatments, each with a different level of involvement in the valuation assessment. The first group was involved in three separate sessions, allowing for significant preference construction and information acquisition. The second group was involved in only one session and the third group was involved only minimally through a telephone contact and the completion of a survey delivered through the mail. The hypothesis being examined was that the degree of involvement in the exercise would affect the responses either in terms of the variances of the responses or the actual preferences. Not all forest values can be examined in a single valuation task. In this case values associated with key game species (moose), wildlife species reflecting biodiversity or threatened species (caribou), old age classes of forest, protected areas and local employment were assessed. These were selected based on the preference construction sessions with the first group. A general trend was found in the ranking of forest values. The values were highest for increases in older forest age classes and protected areas and lower for caribou and moose levels (expressed in percentage changes relative to current levels). The lowest value arose from the local jobs generated by forestry activity. Monetary measures of these values were also developed. The scenario choices made by the individuals revealed that a 5% increase in moose and caribou populations would be worth approximately $10 and $12 per year. A 5% increases in old age classes or protected areas was worth approximately 4 to 5 times as much. They were willing to pay approximately $7 per year in increased taxes for increases in local employment. The hypothesis that the group preferences would differ was not accepted. The preferences of the first and third groups, while expected to be very different, were in fact quite similar. The second group did appear to be different from these other two but it is possible that significant variation in demographic characteristics was driving that difference, rather than the level of preference construction effort. The sample in the third group did however exhibit more resistance to completing the exercise and registered more protests to the value assessment. In conclusion, the approach employed was successful in eliciting passive use values for components of forest management. These values alone provide interesting information for managers to consider in the development of management plans. Evidence supporting the hypothesis that preference construction approaches improve these valuation exercises was not found in this study although this result must be tempered by the limitations arising from sample size and demographic composition of the study groups.
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