In the long run, the most important factor shifting the SRAS curve is productivity growth.
Productivity—in economic terms—is how much output can be produced with a given quantity of labor. One measure of this is output per worker, or GDP per capita.
Since 1947, the U.S. corporate sector has been able to create nine times more goods and services with only a little increase in labor hours thanks to productivity gains. An economy may create and consume more goods and services for the same amount of effort when productivity is growing.
Productivity is a way of thinking and a condition of being. Being effective entails acting in every situation as we actively choose to and not as we feel pressured to by external factors. Being productive requires adopting a mindset of constant development.
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