[The principal characteristic of this economic epoch is] a sustained increase in per capita or per worker product, most often accompanied by an incre… - Simon Kuznets

The inescapable conclusion is that the direct contribution of man-hours and capital accumulation would hardly account for more than a tenth of the rate of growth in per capita product — and probably less. The large remainder must be assigned to an increase in efficiency in the productive resources, or the effects of changing arrangements, or to the impact of technological change, or to all three

[An] epochal innovation [consisting of the] spreading application of science to processes of production and social organization.

Distinctions must be kept in mind between quantity and quality of growth, between its costs and return, and between the short and the long term. Goals for more growth should specify more growth of what and for what.