benefits of alternative policy scenarios for use in rational planning
procedures (Randall, 1986) and to develop ways to make them more
transparent (World Health Organization, 2000). The assessment of
willingness-to-pay (WTP) is a common approach to valuate individual
preferences and the prices of non-market goods such as environmental
quality (Hoevenagel, 1994; U.S. Environmental Protection
Agency, 2011).