There is described herein a system for creating markets for risks associated with an externality. The market may provide for transfer of tradable securities whose value is contingent upon the occurrence of an externality, and that are coupled with an activity permit. Activity permits may be purchased...http://www.google.fr/patents/US20010032168?utm_source=gb-gplus-shareBrevet US20010032168 - Tradable contingent securities bundled with activity permits
Tradable contingent securities bundled with activity permits
