In this Essay we introduce a model of copyright law that calibrates authors' rights and liabilities to the level of originality in their works. We advocate this model as a substitute for the extant regime that unjustly and inefficiently grants equal protection to all works satisfying the...

Fair use is one of modern law's most fascinating and troubling doctrines. It is amorphous and vague, and notoriously difficult to apply. It is, at the same time, vitally important in copyright and perhaps the most frequently raised and litigated issue in the law of intellectual property.This...

Collaborative production of expressive content accounts for an ever growing number of copyrighted works. Indeed, in the age of content sharing and peer production, collaborative efforts may have become the paradigmatic form of authorship. Surprisingly, though, copyright law continues to view the...

This Article demonstrates that all intellectual property defenses fit into three conceptual categories: general, individualized, and class defenses. A general defense challenges the validity of the plaintiff’s intellectual property right. When raised successfully, it annuls the plaintiff’s...

Patent thickets may inefficient retard cumulative innovation. This paper explores two alternative mechanisms that may be used to weed out patent thickets. Both mechanisms are intended to reduce the number of patents in our society. The first mechanism we discuss is price based regulation of...

In its current form, fair use doctrine provides a personal defense that applies narrowly to the specific use by the specific user. The landmark case of Google v. Oracle, currently pending before the Supreme Court, illustrates why this is problematic. Even if the Court were to rule that...

In this Article we explore the evolution of property law and examine the applicability of the prevailing accounts according to which property institutions oscillate between the extreme points of open access and private property. We show that the evolution of property is a much more nuanced...

This Essay addresses an anomaly in trespass law. Trespass law is generally understood as the paradigmatic example of property-rule protection: an owner can obtain an injunction against the trespasser and have him removed from her land. The property-rule protection enjoyed by the owner protects...

In this Article, we provide a blueprint for personalizing copyright law in order to reduce the deadweight loss that stems from its universal application to all users, including those who would not have paid for it. We demonstrate how big data can help identify inframarginal users, who would not...