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東北大学 現代経済学研究会セミナー
Tohoku University Modern Economics Seminar

次回の研究会　UPCOMING EVENT

2025.11.20(THU)16:20-17:50
Title: Workplace Communication and Productivity: Insights from Wearable Sensor Data and Leadership Training Program
中島 賢太郎氏 (一橋大学イノベーション研究センター)
Abstract:
This paper provides causal evidence on how reducing communication costs reshapes the internal organization of problem-solving within firms. Building on Garicano’s (2000) model of hierarchical knowledge organization, we examine whether lowering communication barriers fosters vertical knowledge sharing and enhances productivity. Our empirical setting is a corporate IT support firm where employees resolve complex technical inquiries for client companies. Using wearable sensors, we capture minute-by-minute face-to-face interactions among employees before and after a leadership training program implemented to improve team communication. Exploiting this introduction of the leadership training program as an exogenous reduction in intra-team communication costs, we estimate its effects using difference-in-differences and instrumental variable analyses. We find that teams led by trained leaders exhibit a significant increase of vertical communication between junior and senior members. This substantially improves the problem-solving efficiency of junior employees. The findings provide the first causal evidence that reducing communication barriers endogenously generates hierarchical problem-solving structures, as predicted by Garicano (2000), thereby improving workplace productivity.
2025.11.27(THU)16:20-17:50
Title: Welfare-enhancing public and private insurance arrangements for long-term care risk
R.Anton Braun氏 (GRIPS・政策研究大学院大学)
Abstract:
Long-term care is costly. About one in three Americans will experience a stay in a nursing home that exceeds 100 days during their lifetime, and about one in ten will incur out-of-pocket expenses of $200,000 or more. Surprisingly, only about 10% of retirees have private long-term care insurance. We consider alternative strategies for reforming US long-term care insurance arrangements in a quantitative structural model of the market. We find that individuals disagree about the scale of public insurance provided by Medicaid. Yet, despite differences in income, wealth, and LTC risk exposure, they agree that the secondary payer provision of Medicaid should be removed. Allowing people to top off means-tested Medicaid benefits with private long-term care insurance preserves the safety net provided by Medicaid while stimulating the private insurance market. Social welfare increases, and public expenditures on Medicaid fall.
当研究会について About us：
2006年度より、東北⼤学に在籍する経済学研究者有志が集まって定期的に研究会を開催しております。本研究会では国際的学術雑誌への投稿を精⼒的に⾏っている第⼀線の研究者に研究発表をお願いしております。参加資格は特に設けませんので、報告論題に関⼼のある⽅は奮ってご参加ください。学内の⽅はもちろん、学外の⽅もご参加いただけます。
Since 2006, the Tohoku University Department of Economics has hosted a seminar series inviting economists actively engaged in research publishable in top international economics journals. If you're interested in this, feel free to join our seminar. Participation is open to all, with no restrictions.
使用言語 Language:
原則英語で開催いたします。但し、オーディエンスには日本語で質問する権利を認めますので、ご了承願います。
English is the primary language for the seminar, but feel free to ask questions in Japanese.

お問い合わせ・東北大学外の方でオンラインでの参加をご希望の方は tohoku_modern_econ＠grp.tohoku.ac.jp までご連絡ください ※＠は半角

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