The following pages provide material that may aid in the interpretation and understanding of Tax Policy Center estimates.
- Brief description of the tax model
An abbreviated explanation of the Tax Policy Center's tax simulation model.
- Tax model documentation
A detailed description of how the Tax Policy Center's tax simulation model works, including discussion of the underlying data and the model's tax calculator.
- Explanation of the use of distribution tables
Definitions of various statistics reported in the distribution tables and how to interpret them.
- Explanation of income measures
Detailed definition of the income measure used in distribution tables.
- Explanation of baselines
Detailed definitions of TPC's current law and current policy baselines.
- Income breaks for distribution tables
Income levels that define different percentile ranges of the income distribution for all years covered by the tables, with ranges provided for three income measures: cash income, economic income, and adjusted gross income (AGI).
- Interpreting dividend relief estimates
The Tax Policy Center's method for calculating estimates of the tax relief afforded by the 2003 tax cuts and recommendations for how those estimates should be interpreted.
Answers to common questions about the Tax Policy Center's tax simulation model, the estimates it generates, and the organization of tables in the Center's database.