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英文文献：Is the valuation of water quality sensitive to external shocks? Evidence from political instability in Croatia-水质评估是否对外部冲击敏感?证据来自克罗地亚的政治不稳定
英文文献作者：Kountouris, Yiannis,Nakic, Zoran,Sauer, Johannes
英文文献摘要：
This paper examines the short run sensitivity of willingness to pay (WTP) estimates for groundwater quality and quantity in the presence of external shocks, using data from two choice experiments implemented in Zagreb, Croatia. To assess the sensitivity of WTP estimates we take advantage of a sudden deterioration in political stability, expressed by a series of public protests that took place in the city during the data collection and compare mean WTP estimates before and during the protests. We find that mean WTP for groundwater quality and quantity is sensitive to the occurrence of the protest. The result indicates that events unrelated to environmental quality and especially political instability can influence the valuation of environmental goods. We interpret the result as an indication that the choice experiment method is sensitive enough to capture changes in WTP that are a result of sudden changes in the state of the world.
本文利用在克罗地亚萨格勒布实施的两个选择实验的数据，研究了外部冲击下地下水质量和数量的支付意愿估算的短期敏感性。为了评估WTP估算的敏感性，我们利用了在数据收集期间发生在城市的一系列公众抗议所表达的政治稳定的突然恶化，并比较了抗议之前和抗议期间的WTP均值估算。研究发现，地下水水质和水量的平均落差值对抗议的发生非常敏感。结果表明，与环境质量无关的事件，特别是政治不稳定的事件会影响环境产品的价值。我们认为，这一结果表明选择实验方法足够敏感，能够捕捉到世界状态的突然变化导致的WTP变化。
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