al components D(H), and D(K), . This adapts (A4.4) to K,=H+K=W.+P. + p({K),,+2,-D(H),-D(K),, ifage >=A, (A10.6) and specifically H=W,-D(H), and K=z,+P+p(K),—D(K),, ifage >=A. (A10.7) Next Generation Theory The period of production, as defined by Jevons and Boehm Bawerk, gave the reciprocal of rate of produ