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Necco is correct because the multiplier effect is stronger for government expenditures versus government taxes. All of the increase in government spending enters the economy as increased expenditure, whereas only a portion of the tax increase results in lessened expenditure (determined by the marginal propensity to consume), because part of the tax increase will come from the savings of the taxpayer (determined by the marginal propensity to save). Packard is incorrect; the effect on real GDP of an increase in government spending combined with equal increase in taxes will be positive because the multiplier effect is stronger for government spending versus the tax increase.