Last week HUD released Version 3 of the Location Affordability Index (LAI) dataset. The LAI is a nationwide database of modeled household housing and transportation costs launched by HUD and the Department of Transportation in 2013. The updated version provides greater insight into how these costs vary by geographic and household characteristics. Version 3 primarily uses data from the 2012-2016 American Community Survey to synthesize a database covering all fifty states and the District of Columbia. Version 3 models the LAI at the Census tract level (rather than the block group level used in Versions 1 and 2) and includes income percentiles for each household profile relative to tract income distribution to help users better understand how applicable LAI estimates for each representative household are to any given Census tract.