Data Insights
Data science, data engineering, and expert analysis.
We help clients turn complex data into clear evidence. We work on matters involving marketing measurement, digital platforms, litigation, surveys, experiments, and large-scale data systems.
Data Insights LLC is led by John Chandler, Ph.D., a statistician and data scientist with experience spanning marketing analytics, digital advertising, causal inference, data engineering, and expert witness work.
John has worked with advertisers, technology companies, agencies, nonprofits, universities, and litigation teams on questions where the stakes are high and the data are messy.
Services
Data Science
Statistical modeling, causal inference, experiments and A/B testing, surveys, machine learning, and forecasting.
We help clients move from raw data to dependable analysis, with explicit attention to uncertainty, validity, and clear explanation to non-technical audiences.
Data Engineering
Data pipelines, database design, cloud workflows, data cleaning, reproducible analysis systems, and analytic infrastructure.
We work especially well at the boundary between technical implementation and practical business or litigation needs.
Digital Advertising and Marketing
Multitouch attribution, programmatic ad-allocation engines, marketing spend optimization, brand identity formation, survey design and analysis, and ad tech ecosystem modeling.
We specialize in bridging the gap between complex data science and strategic marketing decisions, from optimizing billion-dollar media plans to establishing nascent brand identities.
Expert Witness Work
Expert reports, rebuttal reports, deposition and trial testimony, statistical review, damages-related analysis, and explanation of technical systems.
John’s expert work focuses on digital advertising, online platforms, marketing analytics, consumer behavior, surveys, and large-scale transactional data.
About John Chandler
John Chandler has worked at the intersection of marketing, statistics, and data science since 1999. Before founding Data Insights, he was Research Director at Microsoft Advertising and Principal Analyst at aQuantive, where he worked on advertising effectiveness, multi-touch attribution, forecasting, and optimization tools for digital advertising.
John received his Ph.D. in Statistics from the University of Montana in 2010. His dissertation applied statistical learning methods to large online datasets, using Cox proportional hazard models with time-varying covariates to estimate the influence of marketing touchpoints on eventual conversions. He also holds an M.S. in Mathematics from the University of Washington and a B.A. from Middlebury College.
John is also a faculty member at the University of St. Thomas in St. Paul, Minnesota. He teaches graduate students in the data science and artificial intelligence master’s programs, teaching data engineering, statistical inference, analytics, and applied data science.
Selected Expert Witness Testifying Experience
In Re: JUUL Labs, Inc. Marketing, Sales Practices and Products Liability Litigation Case No. 19-md-02913-WHO (N.D. Cal.)
The State of Texas, et al. v. Google, LLC Case No. 4:20-cv-00957 (E.D. Tex.)
In Re: Google Digital Advertising Antitrust Litigation Case No. 21-MD-3010 (S.D.N.Y.)
In Re: Social Media Adolescent Addiction/Personal Injury Products Liability Litigation; In Re: Social Media Adolescent Addiction; State of New Mexico, ex rel. Raul Torrez, Attorney General, v. Meta Platforms, Inc., et al. Case No. 4:22-MD-3047 (N.D. Cal.); Case No. 22STCV21355, JCCP No. 5255 (Cal. L.A.); Case No. D-101-CV-2023-02838 (N.M. First Jud. Dist. Ct. Santa Fe Cnty.)
In Re: Uber Technologies, Inc., Passenger Sexual Assault Litigation Case No. 3:23-MD-03084-CRB (N.D. Cal.)
Contact
For consulting, expert witness, or data science inquiries, please use our contact form.