Using the World Inequality Database, wid.world, from the previous question select the data for the United States. In the upper left corner of the page is an option to “select a subregion” or state. Select the data for California, Indiana, Michigan, and New York.

a. What are the current values of the income share for the top 10% and 1% of earners for each state?

b. How has share of income going to the top income earners changed over time for each state?

c. What are the likely factors that explain the increase in income going to the top of the distribution across these three states? What factors explain the difference across states today?