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Harang Ju

Assistant Professor, Johns Hopkins University

Harang Ju is an assistant professor in the Johns Hopkins Carey Business School and former post-doctoral fellow at MIT. He studies AI agents and how they help people work. Harang’s current work uses large field and lab experiments and observational studies. His research appears in Nature Neuroscience and other peer-reviewed journals. He is also an advisor at Moku, an AI and web3 gaming company. Harang holds degrees from the University of Pennsylvania in neuroscience (PhD) and from the University of Virginia in computer science (BS) and cognitive science (BA).

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Featured publications

Research Papers Advancing AI negotiations: A large-scale autonomous negotiation competition

June 9, 2026

  • Sinan Aral | Director, MIT IDE; Professor, MIT Sloan School of Management
  • Harang Ju | Assistant Professor, Johns Hopkins University

    • Michelle Vaccaro

    Michael Caosun

    Jared R. Curhan

     

    This research reveals that principles from human negotiation theory remain crucial even in AI–AI contexts and that AI-specific technical strategies also create success. The results suggest the need to establish a new theory of AI negotiation that integrates classic negotiation theory with AI-specific negotiation theories to better understand autonomous negotiations and optimize agent performance.

Research Papers Teaching AI to handle exceptions: Supervised fine-tuning with human-aligned judgment

May 12, 2026

  • Sinan Aral | Director, MIT IDE; Professor, MIT Sloan School of Management
  • Harang Ju | Assistant Professor, Johns Hopkins University
    • These findings highlight the need to address LLMs’ shortcomings in handling exceptions in order to guide the development of agentic AI toward models that can effectively align with human judgment and simultaneously adapt to novel contexts.
Research Papers Are Crypto Ecosystems (De)centralizing? A Framework for Longitudinal Analysis

December 9, 2025

  • Sinan Aral | Director, MIT IDE; Professor, MIT Sloan School of Management
  • Harang Ju | Assistant Professor, Johns Hopkins University
  • Ehsan Valavi | Postdoctoral Associate
  • Madhav Kumar | Assistant Professor, Harvard Business School

    • This paper proposes a systematic framework for measuring the decentralization of crypto ecosystems over time and compare commonly used decentralization metrics.