We set out dollar-valued net national product for an economy with a wasting essential stock (oil deposit). We take up `maintaining capital intact' and locally unchanging consumption. The percentage change in `net investment' or `genuine savings,' relative to the market rate of interest, denotes...

We derive an expression relating the change in instantaneous utility to the growth of net (genuine) saving in an economy with multiple stocks and externalities that maximizes welfare in the utilitarian sense. This result is then shown to hold for decentralized competitive efficient economies as...