A formalization of the Precautionary Principle is given here: We formalize scientific knowledge on the likelihood of events in the state space and the concepts of scientifically unambiguous events and acts. We give a definition of a non-precautionary social planner as a Savage Expected Utility...

The precautionary principle is formulated in many different ways. However the differences are not of a fundamental nature. What is fundamental in the principle ?' i.e. the recognition that decisions must be taken on the basis of uncertain (also called ambiguous) information, in particular...