An economic contraction/recession caused by a downward shift in aggregate demand causes prices to [Hint: Start with the default graph of AD-AS model, shift AD leftward, then check the price level at short-run equilibrium and at long-run equilibrium (after self-correction)). fall in the short run, and fall even more in the long run rise in the short run, and fall back to their original level in the long run O rise in the short run, and rise even more in the long run fall in the short run, and rise back to their original level in the long run