econ.EM · 2026-07-22 · No. 61

Econometrics, 2026-07-22.

1 new papers in econ.EM. Titles, authors, abstracts. Links to arXiv. Want this in your inbox every morning? Subscribe →

01 — The papers

1 entries
  1. 01

    Optimizing Regret

    Irene Aldridge

    econ.EM · cs.LG · stat.ML

    Building on the identity that expected regret equals the covariance between costs and decisions, this paper develops the complete derivative theory of the covariance regret functional. We derive the Gâteaux derivative, showing that the universal steepest-descent direction is the contrarian policy $-(c-\bar{c})$, while ascent yields momentum. For linear policies $\hatπ(c) = Ac+b$, the gradient is the cost covariance matrix $Σ_c$, with a zero...

    arxiv.org/abs/2607.18866 · PDF

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