Source: Jeffrey Meyer, Journal Public Library Quarterly, Volume 37, Issue 1, 2018
From the abstract:
This analysis identifies relationships between library usage, poverty, and median household income in Iowa. Quantitative analysis identifies two distinctive correlations within this data set. First, there is a negative correlation between library usage and poverty, associating higher library usage with lower poverty. Second, there is a subtle positive correlation between library usage and median household income, associating higher library usage with higher median household income. Library usage data is derived from the Iowa Library Services’ Iowa Public Library Statistics (July 1, 2013–June 30, 2014). Poverty and median household income data is derived from the United States Census Bureau.