This paper is motivated by the observation that there is a difference between the time paths of damage valuations for invasions which affect agricultural compared with environmental systems. In particular, unlike agricultural systems, studies have shown that the social valuation of an...

Understanding the economic value of nature and the services it provides to humanity has become increasingly important for local, national and global policy and decision making. However, problems arise in that it is difficult to obtain meaningful values for goods and services that ecosystems...