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Introduction

Our research covers a wide range of topics, but with a background in statistics and psychology, we have conducted foundational research in statistics, econometrics, and psychology, as well as applied research in various fields such as marketing, behavioral economics, neuroscience, medicine, and public health. For specific research achievements, please refer to the link to the personal page. So far, we have mainly focused on general statistical causal inference research as foundational research, but in the future, we would like to focus particularly on economic and social phenomena and work on developing analytical and evaluation methods that consider mechanisms more thoroughly. Current statistical models do not take into account the irrational tendencies of humans, who are the components of society, when explaining data related to economic and social phenomena, resulting in models with not very high predictive or explanatory power. I am conducting research aiming to develop new econometric models by incorporating insights from behavioral economics and psychology, as well as considering industrial organizational elements such as strategic interactions between decision-making players. Additionally, I would like to apply these results to various fields such as marketing, management studies, labor economics, and education economics.

Achievements

■Causal Inference and Statistical Methods
・Research Objective: To investigate the validity of excluding survey participants with insufficient effort responding to reduce the inconsistency between self-reported data and actual behavior.
- Title: Handling the Inconsistency between Self-Report and the Actual Behavior: Validity of Excluding Survey Participants with Insufficient Effort Responding, Takeuchi Makito, Niimi Junichiro, Hoshino Takahiro （International Journal of Market Research） 66 （ 4 ） 451-472 Jul. 2024
・Research Objective: To estimate the local average treatment effect (LATE) from the combination of separately observed datasets using a novel weighted least squares estimator.
- Title: Estimation of Local Average Treatment Effect by Data Combination, Shinoda Kazuhiko, Hoshino Takahiro （Proceedings of the AAAI Conference on Artificial Intelligence） 36 （ 8 ） 8295-8303 Jun. 2022
・Research Objective: To develop a dynamic two-stage econometric model using a potential outcome approach with Bayesian inference for analyzing category-level and brand-level purchases.
- Title: Dynamic Two Stage Modeling for Category-Level and Brand-Level Purchases Using Potential Outcome Approach With Bayes Inference, Miyazaki Kei, Hoshino Takahiro, Böckenholt Ulf （Journal of Business & Economic Statistics） 39 （ 3 ） 622-635 Jul. 2021
■Consumer Behavior and Marketing
・Research Objective: To examine both short- and long-term effects of promotional incentives in a loyalty program on customer purchase behavior by analyzing a loyalty program using birthday rewards implemented by a major retail company in Japan.
- Title: Quantifying the short- and long-term effects of promotional incentives in a loyalty program: Evidence from birthday rewards in a large retail company, Nishio Kazuki, Hoshino Takahiro （Journal of Retailing and Consumer Services） 81 103957 Nov. 2024
・Research Objective: To propose and validate the use of generalized linear mixed-effects modelling to address inflated Type-1 error rates in multivariate-voxel pattern analysis by incorporating random stimulus effects.
- Title: Stimulus-specific random effects inflate false-positive classification accuracy in multivariate-voxel-pattern-analysis: A solution with generalized mixed-effects modelling, Kajimura Shogo, Hoshino Takahiro, Murayama Kou （NeuroImage） 269 119901 Apr. 2023
・Research Objective: To simultaneously model purchase frequency and amount through a marked point process approach while considering program effects and customer characteristics.
- Title: Joint modeling of effects of customer tier program on customer purchase duration and purchase amount, Nishio Kazuki, Hoshino Takahiro （Journal of Retailing and Consumer Services） 66 102906 May. 2022
■Healthcare and Medicine
・Research Objective: To develop a Hiesho Care Practice Scale (HCPS) for pregnant women and examine its reliability and validity.
- Title: Development of the Hiesho (sensitivity of hands or feet to cold) Care Practice Scale for pregnant women, Nakamura Sachiyo, Takeuchi Shoko, Hoshino Takahiro, Okubo Naoko, Horiuchi Shigeko （Japan Journal of Nursing Science） 22 （ 1 ） Jan. 2025
・Research Objective: To evaluate the effectiveness of a web-based learning program for nurses in improving their knowledge and perceptions about the importance of hiesho care for pregnant women.
- Title: Effects of web‐based learning for nurses on their care for pregnant women with hiesho (sensitivity of hands or feet to cold): A randomized controlled trial, Nakamura Sachiyo, Takeuchi Shoko, Hoshino Takahiro, Okubo Naoko, Horiuchi Shigeko （Japan Journal of Nursing Science） 19 （ 4 ） Oct. 2022
・Research Objective: To conduct an online, real-time survey of adverse events following immunization with the mRNA-1273 vaccine in a workplace vaccination program at Keio University.
- Title: Real-Time Survey of Vaccine Safety of the mRNA-1273 SARS-CoV-2 Vaccine in Workplace Vaccination at Keio University, Okumura Kaho, Hara Azusa, Inada Isa, Sugiyama Daisuke, Hoshino Takahiro, Yakoh Takahiro, Yokoyama Hirokazu, Urushihara Hisashi （Vaccines） 10 （ 9 ） 1461 Sep. 2022
■Social Sciences and Education
・Research Objective: To investigate the effects of manipulating the proportions of news and entertainment content on inadvertent learning among entertainment seekers on a major portal site.
- Title: Inadvertent Learning on a Portal Site: A Longitudinal Field Experiment, Kobayashi Tetsuro, Hoshino Takahiro, Suzuki Takahisa （Communication Research） 47 （ 5 ） 729-749 Jul. 2020
・Research Objective: To conduct a national survey of psychology education programs in Japan and analyze their content and structure.
- Title: A National Survey of Psychology Education Programs and Their Content in Japan, Kusumi Takashi, Yama Hiroshi, Okada Kensuke, Kikuchi Satoru, Hoshino Takahiro （Japanese Psychological Research） 58 （ S1 ） 4-18 Jun. 2016
・Research Objective: To identify longitudinal profiles of social skills during early childhood and investigate the extent to which parenting practices at age 2 predict these developmental trajectories in a Japanese sample.
- Title: Developmental Trajectories of Social Skills during Early Childhood and Links to Parenting Practices in a Japanese Sample, Takahashi Yusuke, Okada Kensuke, Hoshino Takahiro, Anme Tokie （PLOS ONE） 10 （ 8 ） e0135357 Aug. 2015
■Public Health and Policy
・Research Objective: To estimate percentages of awareness and use of e-cigarettes and heat-not-burn tobacco products among the Japanese population, including minors.
- Title: Awareness and use of electronic cigarettes and heat‐not‐burn tobacco products in Japan, Tabuchi Takahiro, Kiyohara Kosuke, Hoshino Takahiro, Bekki Kanae, Inaba Yohei, Kunugita Naoki （Addiction） 111 （ 4 ） 706-713 Apr. 2016
・Research Objective: To compare the effectiveness of complete workplace smoking bans versus partial bans in relation to employee smoking and secondhand smoke-related discomfort/ill-health among Japanese employees.
- Title: Are Partial Workplace Smoking Bans as Effective as Complete Smoking Bans? A National Population-Based Study of Smoke-Free Policy Among Japanese Employees, Tabuchi Takahiro, Hoshino Takahiro, Nakayama Tomio （Nicotine & Tobacco Research） 18 （ 5 ） 1265-1273 May. 2016
■Econometrics and Statistical Modelling
・Research Objective: Development of a new semiparametric Bayes instrumental variables estimation method for improved efficiency and precision in small sample sizes.
- Title: Semiparametric Bayes instrumental variable estimation with many weak instruments, Kato Ryo, Hoshino Takahiro （Stat） 10 （ 1 ） Dec. 2021
・Research Objective: To propose a new semiparametric Bayes multiple imputation approach for handling mixed continuous-discrete covariates in regression models with missing data.
- Title: Semiparametric Bayesian multiple imputation for regression models with missing mixed continuous–discrete covariates, Kato Ryo, Hoshino Takahiro （Annals of the Institute of Statistical Mathematics） 72 （ 3 ） 803-825 Jun. 2020
・Research Objective: Identification of the joint distribution of the potential outcomes under various parametric specifications.
- Title: Parametric identification of the joint distribution of the potential outcomes, Hoshino Takahiro, Takahata Keisuke （Stat） 9 （ 1 ） Jan. 2020
■Technology and Data Science
・Research Objective: To examine whether consideration of floorplan images of real-estate apartments could be effective for improving rental price predictions.
- Title: Incremental Informational Value of Floorplans for Rent Price Prediction, Schneider Jiyan Jonas, Hoshino Takahiro （Lecture Notes in Computer Science） 229-250
・Research Objective: To evaluate the effectiveness of influenza vaccination for people aged under 65 years in Japan during the 2013/2014 season using a doubly robust method applied to a large-scale, real-world dataset.
- Title: Influenza vaccination effectiveness for people aged under 65 years in Japan, 2013/2014 season: application of a doubly robust method to a large-scale, real-world dataset, Shibata Natsumi, Kimura Shinya, Hoshino Takahiro, Urushihara Hisashi （BMC Infectious Diseases） 19 （ 1 ） Dec. 2019

Areas of Research

・Economic Statistics
・Commerce
・Statistical Science

Social Contributions

・Enhancing Intervention Effectiveness
・Advancing Non-Experimental Research
・Increasing Survey Reliability
Video

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