Steve Yadlowsky

Research Scientist, Google Brain
Statistics

<lastname@google.com>

My research advances the way we use machine learning and statistical tools to drive biomedical research. As healthcare data becomes increasingly ubiquitous, improving data-driven biomedical research is timely and important. There is a rush to learn from these new sources of data, and to implement research findings into clinical practice. Hence, it is important to learn reliable and actionable information from the data with real clinical implications. My goal is to go beyond standard machine learning to do reliable causal learning with healthcare data, by leveraging ML models' expressivity to learn from high dimensional observational and experimental data. I keep myself grounded by applying the methods I develop to real data from a variety of healthcare applications. These help motivate my research and provide fruitful opportunities to continue to develop practical machine learning algorithms.

I finished my PhD at Stanford University in June 2020. There, I was fortunate to be advised by Dr. Sanjay Basu and Lu Tian, collaborate with John C. Duchi and his group on topics related to machine learning and stochastic optimization, and collaborate with Nigam Shah and his group on the use of causal methods in clinical informatics.

Education

Ph.D., Dept. of Electrical Engineering, Stanford University
M.S., Dept. of Statistics, Stanford University
B.S., Dept. of Electrical Engineering and Computer Sciences, UC Berkeley

Publications

Submitted / Preprints

S. Yadlowsky, T. Yun, C. McLean, A. D'Amour. SLOE: A Faster Method for Statistical Inference in High-Dimensional Logistic Regression. [arXiv] [code].

S. Yadlowsky, H. Namkoong, S. Basu, J.C. Duchi, L. Tian. Bounds on the Conditional and Average Treatment Effect with Unobserved Confounding Factors. Submitted to: Annals of Statistics. [arXiv].

E. Steinberg, S. Yadlowsky, N.H. Shah. Using public clinical trial reports to evaluate observational study methods. [arXiv].

S. Yadlowsky*, S. Fleming*, N. Shah, E. Brunskill, S. Wager. evaluting Treatment Prioritization Rules via Rank-Weighted Average Treatment Effects. In preparation.

V. Veitch, A. D'Amour, S. Yadlowsky, J. Eisenstein. Counterfactual Invariance to Spurious Correlations: Why and How to Pass Stress Tests. [arXiv].

A. D'Amour, K. Heller, D. Moldovan, et al.. Underspecification Presents Challenges for Credibility in Modern Machine Learning. Submitted to: Journal of Machine Learning Research. [arXiv].

S. Yadlowsky, L. Tian, S. Basu. Testing the Average Treatment Effect Among Compliers with an Active Control. Submitted to: Biometrics.

Published

C. Nagpal, S. Yadlowsky, N. Rostamzadeh, K. Heller. Deep Cox Mixtures for Survival Regression. Machine Learning for Healthcare (MLHC), 2021. [arXiv]

H. Namkoong*, R. Keramati*, S. Yadlowsky*, E. Brunskill. Off-policy Policy Evaluation For Sequential Decisions Under Unobserved Confounding. Neural Information Processing Systems (NeurIPS), 2020. [arXiv] [code]

S. Yadlowsky, F. Pellegrini, F. Lionetto, S. Braune, L. Tian. Estimation and Validation of Ratio-based Conditional Average Treatment Effects Using Observational Data. Journal of the American Statistical Association. 28 May 2020. doi: 10.1080/01621459.2020.1772080. [online] [arXiv]

Yadlowsky S, Basu S, Tian L. A calibration metric for risk scores with survival data. Machine Learning for Healthcare, 2019. [code] [pdf].

S. Kashyap S, S. Gombar S, S. Yadlowsky, A. Callahan, J. Fries, B.A. Pinsky, N.H. Shah. Measure what matters: Counts of hospitalized patients are a better metric for health system capacity planning for a reopening. Journal of the American Medical Informatics Association, 17 June 2020. doi: 10.1093/jamia/ocaa076. [medrxiv] [online]

S. Yadlowsky S, R.A. Hayward, J.B. Sussman, R.L. McClelland, Y. Min, S. Basu. Clinical Implications of Revised Pooled Cohort Equations for Estimating Atherosclerotic Cardiovascular Disease Risk. Ann Intern Med. 5 June 2018. doi: 10.7326/M17-3011.

T. Hashimoto, S. Yadlowsky, and J. Duchi. Reducing optimization to repeated classification. Artificial Intelligence and Statistics, 21st International Conference (AISTATS), 2018.

H. Namkoong, A. Sinha, S. Yadlowsky, and J. Duchi. Adaptive Sampling Probabilities for Non-Smooth Optimization. International Conference on Machine Learning, Proceedings of the 34th, 2017. [
code] [abstract] [pdf].

S. Yadlowsky, J. Thai, C. Wu, A. Pozdnukhov, and A. Bayen. Link Density Inference from Cellular Infrastructure. Transportation Research Board (TRB) 94th Annual Meeting, Proceedings of, 2015.

S. Yadlowsky, P. Nakkiran, J. Wang, R. Sharma, and L. El Ghaoui. Iterative Hard Thresholding for Keyword Extraction from Large Text Corpora. Machine Learning and Applications (ICMLA), 14th International Conference on, 2014. [code] [abstract] [pdf].

C. Wu, J. Thai, S. Yadlowsky, A. Pozdnukhov, and A. Bayen. Cellpath: fusion of cellular and traffic sensor data for route flow estimation via convex optimization. Transportation and Traffic Theory, 21st International Symposium on, 2014.

J. Thai, C. Wu, S. Yadlowsky, A. Pozdnukhov, and A. Bayen. Solving simplex-constrained programs with efficient projections via isotonic regression. Poster presented at Bay Area Machine Learning Symposium, 2014.

* Asterisk indicates co-first authorship.