Consider the city of New Heaven, which is a very open...

Consider the city of New Heaven, which is a very open economy. The city exports reliquaries and has no investment or taxes. The city's residents consume 50 percent of their disposable incomes, and 90 percent of all purchases are imports from the rest of the country. The mayor proposes levying a tax of $100$ million dollars to spend on a public-works program. Mayor Cains argues that output and incomes in the city will rise nicely because of something called "the multiplier." Estimate the impact of the public-works program on the incomes and output of New Heaven. Do you agree with the mayor's assessment?

Key Concepts

Fiscal Multiplier

The fiscal multiplier refers to the ratio by which a change in fiscal policy (such as government spending) will change overall economic output. It is a central concept in Keynesian economics and is calculated as the inverse of one minus the marginal propensity to consume (adjusted for leakages such as taxes, savings, and imports). This multiplier effect captures the idea that an initial injection of spending can lead to a larger increase in total income and production in the economy.

Marginal Propensity to Consume (MPC)

The marginal propensity to consume is the proportion of an additional dollar of disposable income that households spend on consumption rather than save. In fiscal policy analysis, a higher MPC means that any increase in income due to fiscal stimulus is more likely to be spent, thereby amplifying the initial impact on overall economic output through subsequent rounds of spending.

Marginal Propensity to Import (MPI)

The marginal propensity to import measures the fraction of additional income that is spent on imported goods rather than domestically produced goods. In an open economy, a high MPI implies that a significant portion of extra income leaks out of the domestic economy, thereby dampening the multiplier effect of fiscal policy because less money circulates within the country.

Leakages in an Open Economy

Leakages refer to the outflow of funds from the domestic economy, which can occur through savings, taxes, or spending on imports. In an open economy, these leakages reduce the effectiveness of fiscal stimulus since part of the spending shifts to foreign economies instead of circulating domestically. This concept is essential for understanding why the fiscal multiplier in an open economy can be lower than in a closed economy.

Open Economy Fiscal Policy

Fiscal policy in an open economy deals with the challenges and adjustments necessary when a country interacts financially with other economies. The presence of significant imported consumption diminishes the domestic impact of government spending, as funds used for imports do not contribute to domestic income generation as effectively. This concept underscores the need to account for international trade dynamics when evaluating the efficacy of fiscal measures.

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