Walgreen Co. v. Sara Creek Property Co., 966 F.2d 273 (7th Cir. 1992)
Walgreen Co. v.
When a landlord's contemplated lease to a competitor would violate a tenant's contractual exclusivity clause, is a permanent injunction an appropriate remedy, or are money damages an adequate and preferable remedy?
A court may grant a permanent injunction where legal remedies are inadequate—i.e., where damages would be difficult to quantify accurately or would entail high error and administration costs—and where an injunction is feasible to administer and would not impose disproportionate hardship. In choosing between an injunction (a property-rule protection) and damages (a liability-rule protection), the court compares the relative costs of error, information acquisition, litigation, and judicial supervision, as well as the parties' ability to bargain around the remedy to achieve an efficient outcome.
Affirmed. The permanent injunction enforcing Walgreen's exclusivity clause was appropriate because damages would be highly speculative and costly to determine, while a negative injunction was simple to administer and allowed the parties to negotiate private adjustments if efficient.
Walgreen is a leading modern case on remedies that demonstrates when courts should prefer injunctions over damages. It translates the abstract concepts of adequacy, efficient breach, and property vs. liability rules into a practical framework: choose the remedy that minimizes error and administration costs while respecting the parties' bargain. For students, it is a model of remedies analysis that integrates contract doctrine, equity, and law-and-economics, and it is frequently cited for the proposition that difficulty in measuring future losses favors injunctive relief, especially for negative covenants like exclusivity clauses.