Are your metropolitan area definitions consistent throughout your series?

The United states Office of Management and Budget (OMB) defines metropolitan areas according to published standards that are applied to Census Bureau data. The general concept of an metropolitan area is that of a core area containing a large population nucleus, together with adjacent communities having a high degree of economic and social integration with that core. 

We use the most current definitions available from the Office of Management and Budget (OMB) and carry them through the entire time series.

Do you have disposable personal income by county?

Disposable personal income is total personal income minus personal current taxes.

Personal current taxes is tax payments (net of refunds) that are made by persons and that are not chargeable to business expense and certain other payments by persons to government agencies (except government enterprises) that are treated like taxes.

Personal current taxes includes taxes on income, including realized net capital gains, and on personal property. Also included in personal taxes are personal licenses. Contributions for government social insurance are not included.