Search Results for author: Brian Axelrod

Found 8 papers, 2 papers with code

Learning From Strategic Agents: Accuracy, Improvement, and Causality

no code implementations ICML 2020 Yonadav Shavit, Benjamin Edelman, Brian Axelrod

In many predictive decision-making scenarios, such as credit scoring and academic testing, a decision-maker must construct a model that accounts for agents' incentives to ``game'' their features in order to receive better decisions.

Decision Making

LieRE: Generalizing Rotary Position Encodings

no code implementations14 Jun 2024 Sophie Ostmeier, Brian Axelrod, Michael E. Moseley, Akshay Chaudhari, Curtis Langlotz

While Rotary Position Embeddings (RoPE) for natural language performs well and has become widely adopted, its adoption for other modalities has been slower.

Image Classification Position

Random Expert Sampling for Deep Learning Segmentation of Acute Ischemic Stroke on Non-contrast CT

no code implementations7 Sep 2023 Sophie Ostmeier, Brian Axelrod, Benjamin Pulli, Benjamin F. J. Verhaaren, Abdelkader Mahammedi, Yongkai Liu, Christian Federau, Greg Zaharchuk, Jeremy J. Heit

Conclusion: A model trained on random expert sampling can identify the presence and location of acute ischemic brain tissue on Non-Contrast CT similar to CT perfusion and with better consistency than experts.

Non-inferiority of Deep Learning Acute Ischemic Stroke Segmentation on Non-Contrast CT Compared to Expert Neuroradiologists

1 code implementation24 Nov 2022 Sophie Ostmeier, Brian Axelrod, Benjamin F. J. Verhaaren, Soren Christensen, Abdelkader Mahammedi, Yongkai Liu, Benjamin Pulli, Li-Jia Li, Greg Zaharchuk, Jeremy J. Heit

The optimized model trained on expert A was compared to test experts B and C. We used a one-sided Wilcoxon signed-rank test to test for the non-inferiority of the model-expert compared to the inter-expert agreement.

On the Statistical Complexity of Sample Amplification

no code implementations12 Jan 2022 Brian Axelrod, Shivam Garg, Yanjun Han, Vatsal Sharan, Gregory Valiant

The ``sample amplification'' problem formalizes the following question: Given $n$ i. i. d.

Causal Strategic Linear Regression

no code implementations ICML 2020 Yonadav Shavit, Benjamin Edelman, Brian Axelrod

In many predictive decision-making scenarios, such as credit scoring and academic testing, a decision-maker must construct a model that accounts for agents' propensity to "game" the decision rule by changing their features so as to receive better decisions.

Decision Making regression

Sample Amplification: Increasing Dataset Size even when Learning is Impossible

no code implementations ICML 2020 Brian Axelrod, Shivam Garg, Vatsal Sharan, Gregory Valiant

In the Gaussian case, we show that an $\left(n, n+\Theta(\frac{n}{\sqrt{d}} )\right)$ amplifier exists, even though learning the distribution to small constant total variation distance requires $\Theta(d)$ samples.

valid

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