متن اصلی - انگلیسی - We showed in Chapter 4 that it was possible to...

We showed in Chapter 4 that it was possible to obtain long-term per capita growth without exogenous technological progress if the returns to capital were constant asymptotically . We argued that this absence of diminishing returns might apply if we took a broad view of capital to include human, as well as physical, components. This chapter deals explicitly with models that distinguish between physical and .