1 citations · 2 across the 10 of their papers we have counts for
10 papers
or Not : A Tale of Three Algorithms for Streaming: Covariance Estimation after Welford and Chan-Golub-LeVeque
Felix Reichel
We place three algorithms for computing the unbiased sample covariance matrix in streaming and distributed settings on a common algebraic, numerical, and statistical foundation. Th…
High-Performance Variance-Covariance Matrix Construction Using an Uncentered Gram Formulation
Felix Reichel
Reichel (2025) defined the bariance as a pairwise-difference measure that can be rewritten in linear time using only scalar sums. We extend this idea to the covariance matrix by sh…
Price Pass-Through of Austria's Single-Use Plastics Producer Charges: Evidence from Retail Offer Spells
Felix Reichel
Single use plastics (SUPs) impose substantial environmental costs. Following Directive (EU) 2019/904, Austria introduced producer charges and mandatory participation in collection…
Two-Stage Asymmetric Tullock Contests with Cost Shifters and Endogenous Continuation Decision
Felix Reichel
This paper introduces a contest-theoretic simplified model of triathlon as a sequential two-stage game. In Stage 1 (post-swim), participants decide whether to continue or withdraw…
Statistically Significant Linear Regression Coefficients Solely Driven By Outliers In Finite-sample Inference
Felix Reichel
In this paper, we investigate the impact of outliers on the statistical significance of coefficients in linear regression. We demonstrate, through numerical simulation using R, tha…
Strategic Effort and Non-Linear Positional Bandwagon Drafting Benefits in Multi-Stage Competitive Games: Evidence from Triathlon
Felix Reichel
This paper examines strategic effort and positioning choices in finite multistage games These choices can generate positional bandwagon drafting benefits through externalities when…
On Bessel's Correction: Unbiased Sample Variance, the Bariance, and a Novel Runtime-Optimized Estimator
Felix Reichel
Bessel's correction adjusts the denominator in the sample variance formula from n to n-1 to ensure an unbiased estimator of the population variance. This paper provides rigorous al…
Using Covid-19 Response Policy to Estimate Open Water Swim Drafting Effects in Triathlon
Felix Reichel
This study investigates the causal effects of open-water swim drafting by leveraging a natural experiment induced by staggered race starts during the COVID-19 pandemic. Before 2020…
Spatial Competition on Psychological Pricing Strategies -- Preliminary Evidence from an Online Marketplace
Magdalena Schindl, Felix Reichel
This paper investigates whether spatial proximity shapes psychological-pricing choices on Austria's C2C marketplace willhaben. Two web-scraped snapshots of 826 Woom Bike listings -…
Extreme compression of sentence-transformer ranker models: faster inference, longer battery life, and less storage on edge devices
Amit Chaulwar, Lukas Malik, Maciej Krajewski +4
Modern search systems use several large ranker models with transformer architectures. These models require large computational resources and are not suitable for usage on devices w…