2020

Improved Optimistic Algorithms for Logistic Bandits

Faury, Louis, Abeille, Marc, Calauzènes, Clément et al.

Understand

The generalized linear bandit framework has attracted a lot of attention in recent years by extending the well-understood linear setting and allowing to model richer reward structures.

  • It notably covers the logistic model, widely used when rewards are binary.
  • For logistic bandits, the frequentist regret guarantees of existing algorithms are $\tilde{\mathcal{O}}(\kappa \sqrt{T})$, where $\kappa$ is a problem-dependent constant.
  • Unfortunately, $\kappa$ can be arbitrarily large as it scales exponentially with the size of the decision set.

Built on

  • Self-normalized processes: exponential inequalities, moment bounds and iterated logarithm laws

    de la Pena, V. H., Klass, M. J., and Lai, T. L. (2004) · 1933

    Earlier work this paper cites.

  • Stochastic linear optimization under bandit feedback

    Dani, V., Hayes, T. P., and Kakade, S. M. (2008) · 2008

    Earlier work this paper cites.

  • Self-concordant analysis for logistic regression

    Bach, F. et al. (2010) · 2010

    Earlier work this paper cites.

  • Parametric Bandits: The Generalized Linear Case

    Filippi, S., Cappe, O., Garivier, A., and Szepesvári, C. (2010) · 2010

    Earlier work this paper cites.

  • Linearly parameterized bandits

    Rusmevichientong, P. and Tsitsiklis, J. N. (2010) · 2010

    Earlier work this paper cites.

  • Improved Algorithms for Linear Stochastic Bandits

    Abbasi-Yadkori, Y., Pál, D., and Szepesvári, C. (2011) · 2011

    Earlier work this paper cites.

Similar

  • Eluder dimension and the sample complexity of optimistic exploration

    Russo, D. and Van Roy, B. (2013) · 2013

    Cited alongside, same era.

  • Finite-time analysis of kernelised contextual bandits

    Valko, M., Korda, N., Munos, R., Flaounas, I., and Cristianini, N. (2013) · 2013

    Cited alongside, same era.

  • Learning to optimize via posterior sampling

    Russo, D. and Van Roy, B. (2014) · 2014

    Cited alongside, same era.

  • Linear thompson sampling revisited

    Abeille, M., Lazaric, A., et al. (2017) · 2017

    Cited alongside, same era.

  • Scalable generalized linear bandits: Online computation and hashing

    Jun, K.-S., Bhargava, A., Nowak, R., and Willett, R. (2017) · 2017

    Cited alongside, same era.

Then

  • An information-theoretic analysis for thompson sampling with many actions

    Dong, S. and Van Roy, B. (2018) · 2018

    Later among the works it cites.

  • Pg-ts: Improved thompson sampling for logistic contextual bandits

    Dumitrascu, B., Feng, K., and Engelhardt, B. (2018) · 2018

    Later among the works it cites.

  • Bandit algorithms

    Lattimore, T. and Szepesvári, C. (2018) · 2018

    Later among the works it cites.

  • On the performance of thompson sampling on logistic bandits

    Dong, S., Ma, T., and Roy, B. V. (2019) · 2019

    Later among the works it cites.

  • Provably optimal algorithms for generalized linear contextual bandits

    Li, L., Lu, Y., and Zhou, D. (2017) · 2080

    Closest in time.

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