Analysis of the Geographic Distribution of the Mortgage Interest Deduction [July 19, 2017] [open pdf - 886KB]
From the Introduction: "This report presents data on the geographic distribution of the mortgage interest deduction (MID) tax expenditure. Tax expenditures can generally be viewed as either government spending administered via the tax code, or tax incentives that are intended to achieve particular policy objectives. Regardless of the interpretation, tax expenditures such as the mortgage interest deduction provide a benefit to qualifying taxpayers by lowering their federal tax liabilities. For this reason, and because policymakers have expressed interest in increasing equity (fairness) in the tax code, it is important to understand how the benefits of the mortgage interest deduction are distributed. Additionally, understanding how the benefits of the deduction are currently distributed across taxpayers in different states may help Congress in assessing the potential impact on constituents from a particular policy change."
CRS Report for Congress, R43385
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html