4. Which question would be studied by a macroeconomist

Answer: B

Explanation:

What is the impact of a constitutional amendment on the federal budget

A macroeconomist would study the impact of a constitutional amendment on the federal budget because it involves the broader implications of such changes on national economic policies and fiscal health.

A) Can a tax on alcohol reduce the number of fatalities on freeways

This question is primarily concerned with microeconomic issues, as it focuses on the behavior of individuals and specific market outcomes related to alcohol consumption and traffic safety. While it does have economic implications, it does not address aggregate economic factors like national income or overall fiscal policies.

B) What is the impact of a constitutional amendment on the federal budget

This question is relevant to macroeconomics as it examines how changes at the constitutional level can influence national financial policies and government spending. It looks at the broader economic implications of legislation, which is a key concern of macroeconomists.

C) What percentage of an individual's consumer income is spent on medicine

This question pertains to microeconomics, focusing on individual consumer behavior and spending patterns rather than broader economic indicators like national income or aggregate demand. Therefore, it is not a question that a macroeconomist would typically study.

D) What is the market price of corn

This question is also aligned with microeconomic analysis, as it deals with the price determination in a specific market rather than the overarching economic policies or national economic performance that macroeconomists examine.

Conclusion

The correct answer, option B, is definitively focused on the macroeconomic implications of legislative changes on national fiscal health, distinguishing it from the other options that center on microeconomic concerns. All other options fail to address the broader economic context that macroeconomists analyze, making option B the only suitable choice for this question.