Avik Roy's proposal:

 It is my view that the Swiss system could be adapted for American purposes by replacing the mandate with a German-style limited enrollment period, as Paul Starr has advocated at The American Prospect. The limited enrollment approach requires individuals to buy insurance, say, in the month of January during a leap year: if an individual chooses to opt out of insurance at that time, he cannot purchase insurance again until January of the following leap year.

This way, individuals are free to opt out of the system, but prevented from taking advantage of insurance rules regarding pre-existing conditions. Such an approach is more consistent with American customs of liberty and choice than is the individual mandate. Here’s hoping that Anthony Kennedy agrees with me.

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