For instance, are you interested in comparing one specific pest
management treatment with another on a specific crop, or are you thinking
along more general lines, like comparing growing vegetables with growing
cotton?
Also, is the concept of impact tied up at all with risk? If you are
thinking of doing risk assessments on different kinds of risks, or
"comparative risk assessment", many people are having fits with this in
California. It is very dangerous ground.
Peter Stoddard stoddard@empm.cdpr.ca.gov stoddard@netcom.com