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Developing countries also tend to have faster economic growth than "vanguard" countries. This can be explained by the fact that for developing countries, productivity growth is driven in part by importing of existing technology and capital, whereas in countries at the forefront of labor productivity it's driven only by innovation.

(Some easily-viewed graphs here: https://www.un.org/development/desa/dpad/wp-content/uploads/.... Note that while emerging economies have higher labor productivity growth than established economies, both have, somewhat surprisingly, experienced declines in growth over time.)