Working Paper Ircres-CNR 04/2015. The introduction of risk in the microeconomic theory has some important effects on the behavior of the competitive firms: the level of optimal production under condition of risk is lower than under certainty; the optimal mix of productive input shifts to ones with less uncertainty; vertical integration, diversification and hedging are as many responses for optimal management of risks. The conclusions of the microeconomics under uncertainty depend also from the way the risk is modeled: additive risk is easier to handle than multiplicative risk, and conclusions from that are closer to microeconomics under certainty.
