Microeconomics Focuses on Individual Markets, Not Economy-Wide Issues

Steps:

• Define microeconomics as the study of individual consumers, firms, and markets.
• Identify topics related to individual behaviors like demand and production costs as microeconomic.
• Recognize market structures and competition as microeconomic analyses.
• Classify economy-wide phenomena like price level changes as macroeconomic.

Why D is correct:

• Inflation measures overall price increases across the economy, a core macroeconomic indicator per national income accounting definitions.

Why the others are wrong:

• A: Consumer demand analyzes individual buying behavior and utility maximization in microeconomics.
• B: Economies of scale examine cost efficiencies for individual firms in production theory.
• C: Forms of competition describe market structures like monopoly or oligopoly in microeconomic models.

Final answer: D