Welcome to the documentation for the City Controller's revenue analysis for the Five Year Plan!
The documentation outlines the steps involved in running the analysis to produce revenue projections for the City of Philadelphia's major tax revenues. These revenue projections are required as part of the Controller's Office review of the City's annual Five Year Plan.
The analysis code is written in Python and is available on Github. It produces projections for the following tax revenues:
- Wage & Earnings (Current Year Only)
- Business Income & Receipts (BIRT)
- Sales
- Realty Transfer
- Parking
- Amusement
- Net Profits (Current Year Only)
- Beverage
The analysis relies on quarterly revenue data since 1996 and uses either
vector auto regression
via the statsmodels package
or auto-regression via the prophet package to make time-series projections.
In both cases, the regression forecasts incorporate the CBO's latest 10-year
forecast as exogeneous
variables.
- If this is your first time using the code, following the installation instructions.
- If you'd like to dive into using the code, check out the usage section.
- To learn more about the different steps involved in the analysis, check out the code structure docs.