$ tree ~/research

├── presidential-power/

│ ├── unilateral-actions/

│ └── continuous-cost-constraint-theory/

├── computational-methods/

│ ├── llm-classification/

│ ├── aes/

│ └── multimodal-analysis/

└── political-communication/

    └── coming soon

$ whoami

I study the presidency and the separation of powers, with a particular emphasis on measuring the extent to which presidential unilateral actions change the policy status quo. I leverage large language models to analyze the text of unilateral actions to estimate their ideological positions. My methodological interests include applications of LLMs, Bayesian statistics, causal inference with machine learning, and multimodal deep learning analysis of political visual and textual data.

Presidential PowerSeparation of PowersExecutive OrdersPolarizationComputational Social ScienceLLMsMultimodal AnalysisText Analysis

Education

  • Ph.D. Political Science UC Riverside (2022 -- present)
  • M.P.P. Seoul National University (2022)
  • B.A. History Korea University (2016)

$ cat dissertation.md

The Ideological Content of Presidential Unilateral Action

A three-paper dissertation developing a unified, content-focused theory of presidential unilateral action. Presidents strategically calibrate the ideological character, magnitude, and electoral targeting of directives to manage institutional constraints and maximize political returns.

Paper 1

Not Every Unilateral Action Is Ideological

Strategic Visibility & Instrument Choice

Presidents strategically pair ideological directives with less visible instruments like memoranda to minimize political costs.

Paper 2

Unilateral Actions: Continuous Cost Constraint Model and Policy Displacement

Policy Displacement & Anchored Embedding Scaling

Introduces a measure of policy displacement using AES to locate directives and statutes in a common ideological space.

Paper 3

Unilateral Actions and Electoral Responsiveness

Swing-State Targeting

Tests whether presidents tailor directives to electorally pivotal constituencies, particularly during election years.

$ ls ~/research/

Publications

Cho, Eunmi, Sinjae Kang, Kyusik Yang, Yongjai Yu, and Yoonseok Lee (2024). Measuring Legislators' Ideology and Analyzing Ideological Differences Across Standing Committees Using Wordfish.” Journal of Research Methodology. (KCI)

Working Papers

Campaign Contributions and Conspiracy Theory Propagation

Work in progress

Politicians may spread conspiracy theories to raise funds from extremists. Uses 2012 and 2016 ANES data. Finding: Among Republicans, conspiracy theory believers contribute more to candidates.

Campaign Finance · Conspiracy Theories · ANES

When Text Meets Image: Unlocking Frames of Political Videos with Multimodal CLIP

with Eunseong Oh

Presented at PolMeth 2025

Uses CLIP technology to analyze how political videos portray megadonors. Applies multimodal deep learning to understand the framing of political visual media.

Multimodal Analysis · CLIP · Political Communication

Collaborative Pedagogy at Minority-Serving Institutions

with Karina Alpayeva, Emmanoel Ferreira, Sarah Siddique, and Kim Yi Dionne

Work in progress

Active learning strategies in large enrollment courses. Examines collaborative teaching approaches that improve student outcomes at minority-serving institutions.

Pedagogy · Higher Education · Active Learning

Works in Progress

  • Public Interest Representation in Unilateral Actions
  • Domain-Specific Language Models for Legislative Texts (with Eunseong Oh)
  • Economic Conditions and Presidential Agenda-Setting (with Jon Rogowski and Alex Evert)
  • Korean National Assembly YouTube Communication (with Kyusik Yang)

$ tail -f teaching.log

Teaching Assistant — UC Riverside (2023 – Present)

Graduate

  • POSC 202A Survey of Quantitative Methods
  • POSC 202B Survey of Quantitative Methods

Undergraduate

  • POSC 010 American Politics
  • POSC 015 Comparative Politics
  • POSC 017 Politics of Global South
  • POSC 186 Regulation: A Political Perspective
  • POSC 182E Politics and Economic Policy: American Politics

$ open cv.pdf

Methods

Large Language Models · Bayesian Statistics · Causal Inference · Machine Learning · Multimodal Analysis · Text Analysis

Programming

R / Python