Constitutional Limitations on State Tax Exportation

The notion that there are constitutional limitations on the power of the states to export their tax burdens to residents of other states has been the predicate of recent court challenges to state taxing schemes. The concept of state tax exportation and its implications for constitutional analysis have not, however, been systematically explored by the courts. The economics of state tax exportation suggest that a judicial inquiry into the extent of state tax exportation would be a formidable if not an insuperable task. And the Supreme Court, when recently confronted with an opportunity to constitutionalize a principle of excessive state tax exportation, flatly declined to do so. It is nevertheless possible that the concept of state tax exportation may have a role to play in constitutional analysis as a vague admonition to the states not to transgress some yet to be defined norms of fiscal balance in our federal system.