Sara Fish

I am a second-year PhD student at Harvard advised by Yannai Gonczarowski. My research interests lie in EconCS and ML. I am supported by a NSF Graduate Research Fellowship. Previously, I completed my B.S. in Mathematics at Caltech.

Feel free to email me at sfish@g.harvard.edu.

Research

Google Scholar

Algorithmic Collusion by Large Language Models
with Yannai Gonczarowski and Ran Shorrer
Preprint available at arXiv:2404.00806.

Stable Menus of Public Goods: A Matching Problem
with Yannai Gonczarowski and Sergiu Hart
Preprint available at arXiv:2402.11370. (Code)

Generative Social Choice
with Paul Gölz, David Parkes, Ariel Procaccia, Gili Rusak, Itai Shapira, and Manuel Wüthrich
Preprint available at arXiv:2309.01291.
(Project won $100,000 grant via OpenAI's Democratic Inputs to AI program.)

Teaching

(Harvard) CS 37 / ECON 1071 ("Incentives in the Wild"): Teaching Fellow, Fall 2023
(Caltech) Ma 0 ("Intro to Proofs"): Lead Teaching Assistant, Summer 2021
(Caltech) Ma 6a ("Discrete Mathematics"): Teaching Assistant, Fall 2019
(Caltech) Ma 108a ("Real Analysis"): Grader, Fall 2019

Miscellaneous

Command line interface for GPT-4/Claude that I use instead of the web UI
Basic cvc5 tutorial
LaTeX tutorial, created for PROMYS students new to LaTeX

Previous volunteering and employment

In summer 2023, I was a mentor for the Polymath Jr. distinct distances project.
In summer 2022, I worked as an Algo Developer Intern at Hudson River Trading.
In summer 2021, I was a counselor at PROMYS, head TA for Caltech's Math 0, and a mentor at the Polymath Jr. expanding polynomials project.
I volunteered for CHMMC (Caltech Harvey Mudd Math Competition) and wrote the 2019 Power Round.
In summer 2018, I worked as a JC at Canada/USA Mathcamp.

Previous math research

A Construction for Difference Sets with Local Properties
with Ben Lund and Adam Sheffer
European Journal of Combinatorics, Vol. 79, June 2019, pg. 237-243. arXiv

Crescent configurations in Normed Spaces
with D. King, S. J. Miller, E. A. Palsson, and C. Wahlenmayer
Integers, Vol. 20, #A96. arXiv

Local Properties via Color Energy Graphs and Forbidden Configurations
with Cosmin Pohoata and Adam Sheffer
SIAM Journal on Discrete Mathematics, Vol. 34, Jan 2020, pg. 177-187. arXiv