I am a fifth-year Economics PhD student at Columbia University in New York. My research focuses on understanding issues in the digital economy.

Before my PhD, I was a software engineer. Most of the engineering work I did was focused around distributed data processing, backend web development, and product experimentation. I wrote and still maintain several open-source software libraries focused on enabling product experimentation.

Refereed Publications

• Deconstructing the Filter Bubble: User Decision-Making and Recommender Systems (w/ Duarte Goncalves, Shan Sikdar)
  14th ACM Conference on Recommender Systems (RecSys'20)
• The Perils of Exploration under Competition: A Computational Modeling Approach (w/ Kevin Liu, Alex Slivkins, Steven Wu)
  20th ACM Conference on Economics and Computation 2019 (EC ’19)
  Talk Video

Working Papers

• The Economic Consequences of Data Privacy Regulation: Empirical Evidence from GDPR (w/ Yeon-Koo Che, Tobias Salz)
  • NBER Working Paper #26900
  • Coverage: Marginal Revolution, MIT Sloan Ideas Made to Matter
  • Recorded Talks: FTC PrivacyCon(@58:00)
• Competing Bandits: The Perils of Exploration under Competition (w/ Yishay Mansour, Alex Slivkins, Steven Wu)
  • Extended version of the EC'19 paper
• Recommenders' Originals: Integrated Recommender Systems and Vertical Foreclosure (w/ Duarte Goncalves)
• Adaptive Efficient Coding: A Variational Autoencoder Approach (w/ Francesco Grechi, Michael Woodford)

Other

• Training Data Poisoning in Imperfect Information Games (w/ Jisha Jacob, Natania Wolansky, Iddo Drori)
  • Presented at 2019 New York Academy of Sciences Annual Machine Learning Symposium
  • Poster

At Columbia University, I was a teaching assistant for:

• "Data TA" - help seminar and honors thesis students with programming and econometrics (Spring 2018, Spring 2020)
• Introduction to Econometrics for Simon Lee (Spring 2019)
• Economic Growth and Development for Xavier Sala-i-martin (Fall 2017)

Open Source Software

• Front-end Product Experimentation Tools around PlanOut
• Blog Post
• PlanOut.js - A JavaScript port of Facebook's PlanOut Experimentation Framework
• react-experiments - React components for implementing UI experiments
• Scientist4J - A port of Github's refactoring tool in Java (~6000 downloads/month)

Industry Projects

• Previous companies / products I worked on:
• Nutonian
• HubSpot Workflows
• Co-founded projects:
• RequestNow
• Press: Boston Globe

• g.aridor_at_columbia.edu
• Department of Economics, 420 West 118th St., New York, NY 10027