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econ.EM2026
Visible or Covert? The Causal Effect of Inspector Visibility on Fare Evasion Detection: A Causal Machine Learning and Policy Learning Approach
Hannes Wallimann, Cédric Brütsch, Martin Huber
Fare evasion generates substantial revenue losses for public transport operators and is typically combated through fare inspections, yet little is known about how the mode of inspe…
econ.EM2025
Catching Bid-rigging Cartels with Graph Attention Neural Networks
David Imhof, Emanuel W Viklund, Martin Huber
We propose a novel application of graph attention networks (GATs), a type of graph neural network enhanced with attention mechanisms, to develop a deep learning algorithm for detec…