Incremental innovation generally costs less and is easier to achieve.
增值性的革新通常花的成本少,并且容易成功。
Though the statistics are less reliable for the years before 1950, it seems that in the early 20th century potential output grew rapidly thanks both to technological innovation and rapid immigration.
尽管1950前的统计数据并不是那么可靠,似乎在20世纪早期由于技术革新和加速移民潜在产出增长快速。
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