Unstable outcomes mean that Multiple choice question. once AD and AS reach the full-employment equilibrium, shifts of AD and AS can move the economy away from that equilibrium. there is a lot of instability on the way to reaching the full-employment equilibrium, but once there, the economy is stable. AS and AD can never bring an economy close to the full-employment equilibrium. the price-output relationship at equilibrium may not satisfy our macroeconomic goals