We revisit optimal investment in energy-efficiency, presenting a decision framework built around the agent's wealth and wealth dynamic. An investment rule in the form of a trigger is derived such that the agent invests the first time the energy-carrier price crosses this threshold from below....

The ecological literature suggests that biodiversity reduces the variance of ecosystem services. Thus, conservative biodiversity management has an insurance value to risk-averse users of ecosystem services. We analyze a conceptual ecological-economic model in which such management measures...

The study will attempt to critically analyze the real and potential economic problems of these regional groupings in the light of the provisions, of the various treaties and agreements, which deal with the objectives of trade liberalization, financial, fiscal and monetary harmonization,...