In terms of aggregate supply, the difference between the long run and the

short run is that in the long run:

$20.$ The long$-$run aggregate supply curve is vertical:

at the same rate as real GDP$.$

$21.$ The short$-$run aggregate supply curve is up sloping because:

$22.$ Other things equal, an increase in the price level will:

$23.$ Other things equal, a decrease in the price level will

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