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Alexander Ritchie

2 accepted papers

2023

Online Platforms and the Fair Exposure Problem under Homophily

AAAI 2023technical

In the wake of increasing political extremism, online platforms have been criticized for contributing to polarization. One line of criticism has focused on echo chambers and the recommended content served to users by these platforms. In this work, we introduce the fair exposure problem: given limite…

2020

Consistent Estimation of Identifiable Nonparametric Mixture Models from Grouped Observations

NeurIPS 2020poster

Recent research has established sufficient conditions for finite mixture models to be identifiable from grouped observations. These conditions allow the mixture components to be nonparametric and have substantial (or even total) overlap. This work proposes an algorithm that consistently estimates an…