Abstract:

he research on the extinction of renewable resources caused by human exploitation should be based on individual rationality and benefitmaximization in the short run.Following this rule,this paper analyzed the extinction of precious renewable resources (PRR) by modeling.The renewing speed of renewable resources increases at first as the stock of resources decreases.However,it will decrease if the stock is less than a certain amount.Accordingly,its function is constructed.The total cost function of exploitation is built on the condition where the activities follow the rule of Diminishing Marginal Product.The concept of PRR is defined and the selling price function is built on the basis of PPR's two characteristics,i.e.nonsubstitution and unproducibility by people.From the two functions above,this paper deduced the speed function of exploiting PRR when the exploiters' profit maximized in the market economy.Based on these models,the extinction of PRR is explained theoretically.In the end,some pertinent measures are proposed according to the model.Besides,we argued that people may avoid the extinction and get more resources permanently if the government manages to control the exploitation and that the ultimate solution resorts to the development of technology.〖

Key words: precious renewable resources, extinction, stock of the resources〖