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Christopher S. Yoo

John H. Chestnut Professor of Law, Communication, and Computer & Information Science; Director, Center for Technology, Innovation & Competition

Christopher Yoo

Christopher Yoo has emerged as one of the nation’s leading authorities on law and technology. His research focuses on how the principles of network engineering and the economics of imperfect competition can provide insights into the regulation of electronic communications. Continue reading…


  • Antitrust
  • Communications Law
  • Intellectual Property
  • Mass Media Law
  • Government Regulation
  • Regulated Industries
  • Presidential Power
  • Separation of Powers
  • Law and Technology


REGULATING THE CLOUD: POLICY FOR COMPUTING INFRASTRUCTURE (Christopher S. Yoo & Jean-Francois Blanchette eds., MIT Press 2015).
[Available Here]

[Available Here]

CRITICAL CONCEPTS IN INTELLECTUAL PROPERTY LAW: COPYRIGHT, 2 vols. (Christopher S. Yoo ed., Edward Elgar 2011).
[Available Here]

NETWORKS IN TELECOMMUNICATIONS: ECONOMICS AND LAW (Cambridge Univ. Press 2009) (with Daniel F. Spulber).
[Available Here]

[Available Here]

Articles and Book Chapters

The Bounds of Executive Discretion in the Regulatory State, 164 U. PA. L. REV. 1587 (2016) (with Cary Coglianese).

Presidential Signing Statements: A New Perspective, 164 U. PA. L. REV. 1801 (2016).

Modularity Theory and Internet Policy, 2016 U. ILL. L. REV. 1.

Moore's Law, Metcalfe's Law, and the Theory of Optimal Interoperability, 14 COLO. TECH. L.J. 87 (2015).

Cyber Espionage or Cyberwar?: International Law, Domestic Law, and Self-Protective Measures, in CYBERWAR: LETHICS FOR VIRTUAL CONFLICTS (Jens David Ohlin, Kevin Govern, & Claire Finkelstein eds., Oxford University Press 2015).

Wickard for the Internet? Network Neutrality After Verizon v. FCC, 66 FED. COMM. L.J. 415 (2014).

Technological Determinism and Its Discontents, 127 HARV. L. REV. 914 (2014) (book review).

Antitrust, the Internet, and the Economics of Networks, in OXFORD HANDBOOK OF INTERNATIONAL ANTITRUST ECONOMICS 380 (Roger D. Blair & D. Daniel Sokol eds., Oxford University Press 2014) (with Daniel F. Spulber).

The Impact of Codification on the Judicial Development of Copyright, in INTELLECTUAL PROPERTY AND THE COMMON LAW 177 (Shyamkrishna Balganesh ed., Cambridge University Press 2013).

The Wires Go to War: The U.S. Experiment with Government Ownership of the Telephone System During World War I, 91 TEX. L. REV. 983 (2013) (with Michael A. Janson).

Protocol Layering and Internet Policy, 161 U. PA. L. REV. 1707 (2013).

Are Those Who Ignore History Doomed to Repeat It?, 78 U. CHI. L. REV. 1627 (2011) (book review) (with Peter Decherney & Nathan Ensmenger).

Nonrivalry and Price Discrimination in Copyright Economics, 157 U. PA. L. REV. 1801 (2009) (with John P. Conley).

Mandating Access to Telecom and the Internet: The Hidden Side of Trinko, 106 COLUM. L. REV. 1822 (2007) (with Daniel F. Spulber).

Copyright and Public Good Economics: A Misunderstood Relation, 155 U. PA. L. REV. 635 (2007).

Network Neutrality and the Economics of Congestion, 94 GEO. L.J. 1847 (2006).

Beyond Network Neutrality, 19 HARV. J.L. & TECH. 1 (2005).

Copyright and Product Differentiation, 79 N.Y.U. L. REV. 212 (2004).

Vertical Integration and Media Regulation in the New Economy, 19 YALE J. ON REG. 171 (2002).

More publications can be found here.

Working Papers

Avoiding the Pitfalls of Net Uniformity: Zero Rating and Nondiscrimination, 50 REV. INDUS. ORG. 509 (2017).
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Wireless Networks: Technological Challenges and Policy Implications, 31 BERKELEY TECH. L.J. 1409 (2017).
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Copyright and Personhood Revisited (forthcoming)
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U.S. vs. European Broadband Deployment: What Do the Data Say?
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An Unsung Success Story: A Forty-Year Retrospective on U.S. Communications Policy, 41 TELECOMM. POL'Y 891 (2017).
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Open Source, Modular Platforms, and the Challenge of Fragmentation, 1 CRITERION J. ON INNOVATION 619 (2016). (forthcoming)
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Public Good Economics and Standard Essential Patents, U of Penn, Inst for Law & Econ Research Paper No. 14-27.
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Research Areas

  • Telecommunications Law
  • Cyberlaw/Internet Law
  • Copyright
  • Mass Media Law
  • Presidential Power
  • Economic Regulation


Penn Law - John H. Chestnut Professor of Law (2011- ); Founding Director, Center for Technology, Innovation and Competition (2007- ); Professor (2007-2011); Visiting Professor (2006)

Annenberg School for Communication, Penn - Professor (2007- )

School of Engineering and Applied Science, Department of Computer and Information Science, Penn - Professor (2010- )

Vanderbilt University - Professor of Law and Founding Director, Technology and Entertainment Law Program (2005-07); Associate Professor (2002-2005); Assistant Professor (1999-2002)

Law Clerk to the Hon. Anthony M. Kennedy, Supreme Court of the United States (1997-98)

Law Clerk to the Hon. A. Raymond Randolph, United States Court of Appeals for the D.C. Circuit (1995-96)

Professional Activities

Testimony, Senate Committee on Commerce, Science, and Transportation (March 11, 2010).

Testimony - House Committee on Energy and Commerce (Feb. 28, 2014).

Testimony, House Committee on the Judiciary (Dec. 16, 2009; and Mar. 11, 2008).

Testimony, Federal Communications Commission (Sept. 16, 2014; Jan. 13, 2010; Feb. 25, 2008; and Dec. 11, 2006).

Testimony, Federal Trade Commission (Feb. 14, 2007).

Testimony, Senate Committee on the Judiciary (Apr. 9, 2014; June 27, 2006; and Sept. 25, 2005).

Internet Governance Forum (Sept. 3, 2014; and Oct. 24, 2013)

Appearances, NewsHour with Jim Lehrer (July 26, 2006; and June 28, 2002).


  • Antitrust
  • Introduction to Intellectual Property
  • Telecommunications Law
  • Copyright Theory
  • Internet Law
  • Technology and Policy

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