Yujian C.

Key Skills

Freelancer Overview

Yujian Chen [email protected] | yujianchen.weebly.com Summary Economics PhD (Johns Hopkins University, August 2025). Native Mandarin and Cantonese; fluent academic English. Four years grading PhD-level economic theory at Johns Hopkins and serving as referee for two peer-reviewed field journals. Comfortable evaluating long-form formal arguments, mathematical proofs, and quantitative code. Best Suited For LLMoutputevaluationandRLHFinmathematics,formaleconomicreasoning,anddecisionthe- ory. Code review and quantitative-script grading in Python, R, and Stata. English-to-Mandarin and Mandarin-to-English translation and bilingual annotation. Academic-prose evaluation and critique. Evaluation Experience Referee for Economic Theory and the Journal of Mathematical Economics: read submitted manuscripts end-to-end and wrote structured reports on argument correctness, novelty, and ex- position. Teaching Assistant, PhD Microeconomic Theory I and II, Johns Hopkins University, 2020 to 2024. Graded weekly problem sets in decision theory, game theory, general equilibrium, and mechanism design; held office hours; wrote feedback on student proofs. Teaching Assistant, undergraduate Elements of Microeconomics, Johns Hopkins University, 2021. Languages Mandarin Chinese (native), Cantonese (native), English (fluent, academic). Technical Skills Python, R, MATLAB, Stata, LaTeX, Markdown, Git. Education PhD, Economics, Johns Hopkins University August 2025 MA, Economics, Jinan University 2019 BS, E