2.1.0

This release updates the default_parameters.json to reflect changes in tax law enacted on July 4, 2025. Compatibility with Python 3.13 is also tested.

2.0.0

A major release, this version updates the DepreciationParameters class object to allow for more flexibility with updating tax depreciation rules by asset by year.

1.5.2

Updates to avoid deprecated methods in package dependencies.

1.5.1

This release updates the scripts to build the CCC package.

1.5.0

This release:

• Enables CCC to run with Python 3.12
• Updates to work with latest versions dependencies including Tax-Calculator and ParamTools
• Adds a missing file used to produce data on depreciation rates

1.4.1

Allows for ease of use of the Tax Micro Data (TMD) file.

1.4.0

This release:

• Adds a new R&E credit parameter, which allows the R&E credit to vary by asset and industry
• Update the methods for the tax treatment of certain IP
• Allows for alternative individual income tax baseline policies

1.3.0

This release:

• Updates the default start year to 2024
• Makes fixes to work with the latest versions of Numpy, Pandas, and Bokeh
• Modifies the cs-config files for a new launch of the CCC web app

1.2.11

The release:

• Adds the depreciable life of assets to the output dataframes
• Allows for exclusion of land or inventories from calculations by asset
• Removes an exception for the cost of capital being less than zero

1.2.10

• Bug fix for Pandas
• Updates to docs