Multiplier (economics)
General method

Dynamic multipliers can also be calculated. That is, one can ask how a change in some exogenous variable in year t affects endogenous variables in year t, in year t +1, in year t +2, and so forth. A graph showing the impact on some endogenous variable, over time (that is, the multipliers for times t, t +1, t +2, etc.), is called an impulse-response function. The general method for calculating impulse response functions is sometimes called comparative dynamics.
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