Arthur Okun, a famous American economist, found the empirical relationship between economic growth rate and unemployment rate in cyclical fluctuations, that is, when the real GDP growth decreases by 2% relative to the potential GDP growth (generally defined as 3% in the United States), the unemployment rate increases by about 1%. This rule, named after its discoverer, is called Okun's law. This concept was first proposed by Okun. It refers to the maximum output value generated by a country's economy while maintaining relatively stable prices. Potential GDP is also known as full employment GDP.
method?
Bats can fly fast at night and avoid obstacles because their ears can hear the echo of ultrasonic waves when they encounter obstacles. If their ears were plugged, they may hit obstacles. If their eyes were covered, it may not hit obstacles.