ysical capital K. Their outputs respectively are work W and (net) profit P. Their counterparts to (A1.1) and (A1.6a) are W=H+F(H), r(H)=g(H)+f(H), P=K+F(K) and r{K)=g(K)+f(K), (A1.8) where F(H), f(H), F(K) and f(K) are respectively “human cash flow”, “human cash yw tt flow rate”, “physical cash flow”