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Kohsuke Kubota

NTT DOCOMO, INC.

SANNO PARK TOWER

2-11-1 Nagata-cho, Chiyoda-ku, Tokyo 100-6150

Japan

Keio University - Graduate School of Economics

United States

  • NTT DOCOMO, INC.

  • Keio University - Graduate School of Economics

SCHOLARLY PAPERS

3

DOWNLOADS

45

TOTAL CITATIONS

0

Scholarly Papers (3)

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1.

Causal Effect of Lottery Promotions on Post-Win Payments: Evidence from a Large Field Experiment

Innovative Marketing, Volume 21, Issue 2, 2025
Number of pages: 13 Posted: 06 Aug 2025
Kohsuke Kubota, Keiichi Ochiai and Takahiro Hoshino
NTT DOCOMO, INC., Yokohama City University and Keio University
Downloads 26 (1,372,601)

Abstract:

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Uncertainty, Lottery, Promotion, Mobile Payment, Field Experiment, Loyalty Program

2.

Bayesian Time-Varying Meta-Analysis via Hierarchical Mean-Variance Random-effects Models

Number of pages: 18 Posted: 27 May 2026
Kohsuke Kubota, Shonosuke Sugasawa, Keiichi Ochiai and Takahiro Hoshino
NTT DOCOMO, INC., Keio University, Yokohama City University and Keio University
Downloads 11 (1,548,648)

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Bayesian estimation, Meta-analysis, Markov Chain Monte Carlo, Gaussian process, Shrinking both means and variances

3.

Impact of lottery promotion wins and losses: evidence from a promotion in a mobile payment service

Asia Pacific Journal of Marketing and Logistics, Vol. ahead-of-print, No. ahead-of-print, 2025. https://doi.org/10.1108/APJML-03-2025-0514
Number of pages: 19 Posted: 10 May 2026 Last Revised: 12 May 2026
Kohsuke Kubota and Takahiro Hoshino
NTT DOCOMO, INC. and Keio University
Downloads 8 (1,561,096)

Abstract:

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Uncertainty, Lottery promotion, Mobile payment, Field experiment, Difference-in-differences Paper type Research article