Joanna Diane Caytas practices in the Tax Group and in the Blockchain Technology & Digital Assets Group at the firm. She focuses on tax planning for complex transactions, including private and public mergers and acquisitions, corporate restructuring, private equity, cross-border and international transactions. Her practice also includes advising on tax issues related to the formation and operation of onshore and offshore investment funds as well as their investments, including in digital assets. Joanna published numerous legal articles, including on blockchain and related technologies, and was cited in a European Parliament report on blockchain.


“Regulation of Cryptocurrencies and Initial Coin Offerings in Switzerland: Declared Vision of a ‘Crypto Nation’,” NYSBA International Law Practicum, August 2018

“Regulation of Cryptocurrencies and Initial Coin Offerings in Poland — Ambivalence at Its Best,” NYSBA International Law Practicum, August 2018

Weaponizing Finance: U.S. and European Options, Tools, and Policies,” Columbia Journal of European Law, 2017

“Sanctions, Real and Imaginary: Experiences with Russia in the Ukraine Crisis,” Amsterdam Law Forum, May 2017

“Regulatory Issues and Challenges Presented by Virtual Currencies,” Columbia Business Law Review, May 30, 2017

“Blockchain in the U.S. Regulatory Setting: Evidentiary Use in Vermont, Delaware, and Elsewhere,” Columbia Science and Technology Law Review, May 30, 2017

“European Perspectives on an Emergent Law of Robotics,” Columbia Journal of European Law: Preliminary Reference, April 4, 2017

“No Prisoner’s Dilemma Here: A Fresh Look at Escapism from the Realities of International Taxation,” Oxford Business Law Blog, Jan. 12, 2017

“Tempted by an Apple: Europe’s Fall from Grace on Retroactive Taxation,” Columbia Journal of European Law: Preliminary Reference, Nov. 10, 2016

“Developing Blockchain Real-Time Clearing and Settlement in the EU, U.S., and Globally,” Columbia Journal of European Law: Preliminary Reference, June 22, 2016

“Does Culture of the Legal Dimension Equal the Legal Dimension of Culture? Columbia Journal of European Law, 2016

“Disposing of Relics: Overt and Covert Blasphemy Statutes in Europe, Columbia Journal of European Law: Preliminary Reference, April 1, 2016

“Crowdfunding Venture Capital in Europe,” Columbia Journal of European Law: Preliminary Reference, Oct. 1, 2015

“Legal Aspects of Technology Assessment and Systems Analysis in Sustainable Urban Development,” Consilience, 2015 

“From Shield to Sword: TTIP’s Lessons on Democratic Legitimacy for International Investment Arbitration,” Columbia Journal of Law and Social Problems: Common Law, April 23, 2015

“The Element of Discretion in Kelsen’s Pure Theory of Law,” Washington Undergraduate Law Review, Fall 2012


Speaking Engagements

Weaponizing Finance: U.S. and European Options, Tools, and Policies,” Salzburg Global Seminar Lloyd N. Cutler Fellowship workshop in International Law, Washington, D.C., Feb. 2017


  • The American Society of International Law

    • Group on International Economic Law
    • Group on International Law and Technology
  • American Bar Association

    • Committee on Taxation
    • Subcommittee on International Tax
  • Association of the Bar of the City of New York

  • New York State Bar Association

    • Tax Section
      • Investment Funds Committee
      • Securitizations and Structured Finance Committee
      • Financial Instruments Committee