Honor Economics Practice Exam 2026 – Your Comprehensive All-in-One Guide to Exam Success!

The IS-LM framework analyzes the short-run equilibrium where two markets meet: the goods market and the money market. The IS curve comes from the goods market, showing combinations of output and the interest rate where investment equals saving, so it captures how demand for goods responds to changes in the interest rate. The LM curve comes from the money market, representing combinations where money demand equals money supply, so it shows how the demand for liquidity moves with income and the interest rate. With prices held steady in the short run, the intersection of these two curves pins down the economy’s output and interest rate.

This setup is particularly useful for understanding how fiscal policy (government spending and taxes) and monetary policy (money supply or the policy rate) shift demand and money balances. An increase in government spending or a tax cut raises demand for goods, shifting the IS curve right and raising output and the interest rate. Conversely, increasing the money supply shifts the LM curve right, boosting output and lowering the interest rate. The framework is designed to illuminate these short-run policy effects and the interaction between the goods and money markets, rather than long-run growth, international trade balances, or exchange-rate determination.