Found through Planning Magazine
https://www.chicagofed.org/region/community-development/data/pcitAbout the Peer City Identification Tool
The Peer City Identification Tool (PCIT), developed by the Community Development and Policy Studies division (CDPS) of the Federal Reserve Bank of Chicago, is a data comparison and visualization instrument that can help policymakers and practitioners understand a municipality in the context of peer cities. Drawing on city-level indicators from the American Community Survey and historical Decennial Census records, the PCIT performs a cluster analysis to identify groups of similar cities along economic, demographic, social, and housing dimensions. The 300 cities included in the dataset had a population of at least 50,000 in 1960. Today, they have a median population of just over 100,000. All cities meeting this historical criterion are included in the tool, with a few cities excluded due to data consistency concerns. The tool stems from the Industrial Cities Initiative (ICI), a study that profiled ten Midwestern cities with manufacturing legacies, describing how they have fared in socioeconomic terms over time.