Brandon Oselio

Postdoctoral Scholar, Biostatistics at the University of Michigan

Davis, CA
Ann Arbor, MI

Welcome to my site. I am a statistician and data scientist interested in implementing and improving state-of-the-art methods for a variety of challenging problems with data. In the past, I have worked extensively in the fields of statistical modeling for network data and statistical signal processing.

For information on some of the research topics I am interested in, please see here, or browse the highlighted research below. To see some of the code that I have written, please see here. A copy of my PhD thesis can be found here.

As of 2021, I am on the job market.

Highlighted Research

    Statistical Models for Hierarchical Interaction Data

    Network data often arises via a series of structured interactions among a population of constituent elements. E-mail exchanges, for example, have a single sender followed by potentially multiple receivers. We introduce a statistical model, termed the Pitman-Yor hierarchical vertex components model (PY-HVCM), that is well suited for structured interaction data. The proposed PY-HVCM effectively models complex relational data by partial pooling of local information via a latent, shared population-level distribution. We also establish global sparsity and power law degree distribution, which mirrors most real-world network behavior. More information can be found here.

    Time-Adaptive Interaction Estimation using Adaptive Directed Information

    Directed information (DI) is a useful tool to explore time-directed interactions in multivariate data. However, as originally formulated DI is not well suited to interactions that change over time. In previous work, adaptive directed information was introduced to accommodate non-stationarity, while still preserving the utility of DI to discover complex dependencies between entities. More information can be found here.