Economic Definition of four-sector injections-leakages model. Defined.
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Term four-sector injections-leakages model Definition: A model used to identify equilibrium in Keynesian economics based on injections (investment, government purchases, and exports) and leakages (saving, taxes, and imports) for all four sectors (household, business, government, and foreign). Equilibrium is achieved at the intersection of the S + T + M line, and I + G + X line.