Why do economic growth rates tend to converge across countries? It is because ________ occurs more readily when capital per worker is low, combined with what other factor?

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technical innovation that expands capital usagetechnology catch-up involving broader capital applicationtechnical innovation that increases capital intensitycapital intensification along with technological catch-up

Explanation

Economic growth rates converge because increasing capital per worker (capital deepening) is easier in countries with initially low capital. Additionally, these countries benefit from catching up to advanced technologies, which accelerates their growth.