The correct answer is Monetarist, which centers on the idea that the money supply is a primary driver of economic activity, inflation, and overall growth. Monetarists argue that changes in the quantity of money in circulation significantly influence aggregate demand and price levels over time. In practice, this links closely to the role of a central bank (in the U.S., the Federal Reserve) in influencing economic conditions through monetary tools that affect the availability and cost of money and credit. For SIE purposes, the key takeaway is that monetarist thinking emphasizes controlling money supply growth to promote stable economic expansion and manage inflation.

This differs from Keynesian theory, which typically emphasizes fiscal policy (government spending and taxation) and total demand management as the main lever for stabilizing the economy, especially during recessions. While Keynesians also recognize monetary policy, they usually place more focus on government intervention through budget policy to influence employment and output. Supply-side approaches focus more on policies intended to increase production incentives (e.g., lowering taxes and reducing regulation to stimulate investment and labor supply), rather than treating money supply as the central driver. Demand-pull is not a broad “model” in the same sense; it is most commonly associated with a type of inflation where rising demand outpaces supply, pushing prices upward.

The FINRA SIE outline includes principal economic theories (including Keynesian and Monetarist) and tests candidates’ ability to identify which framework aligns with a described belief about what drives growth and market conditions.