The main near-term objective is to complete the transformation of Tax-Calculator into a microsimulation model that conducts only static analysis of reforms. This involves the development of other modules that can be used along with Tax-Calculator to conduct non-static analysis that generates both aggregate and distributional reform results. At least three other modules are being planned:
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Partial-equilibrium behavioral-response capabilities have been completed,
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Business-taxation capabilities are being developed that will permit the effects of reforms in (corporate and pass-through) business taxes to feedback to Tax-Calculator, and
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Macro-model capabilities are being planned that will allow macroeconomic growth feedback to Tax-Calculator.
Once Tax-Calculator can support these other modules in the USA tax collection of the Policy Simulation Library, it is anticipated that the public application programming interface (API) of Tax-Calculator will be stable.
In the long-term Tax-Calculator will be enhanced in the following ways:
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Fix bugs in tax-calculation logic,
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Add new policy parameters to enable simulation of new reforms,
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Add historical policy parameter values as they become available,
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Update input data used by Tax-Calculator as they become available, and
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Improve user and developer documentation.