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The Supreme Courts Municipal Bond Decision And The Market-Participant Exception To The Dormant Commerce Clause, Dan T. Coenen

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Does it violate the dormant Commerce Clause for a state to exempt interest earned on its own bonds, but no others, from income taxation? In a recent decision, the Supreme Court answered this question in the negative. Six members of the Court found the case controlled by the state-self-promotion exception to the dormancy doctrine's antidiscrimination rule. Three of those Justices, however, went further by also invoking the longstanding market-participant exception to sustain the discriminatory state tax break. This Essay challenges that alternative line of analysis. According to the author, the plurality's effort to apply the market-participant principle: (1) invites a …