Dynamic optimization under uncertain environments and its expansion to game theory
| Project/Area Number |
15H04420
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | Shizuoka University |
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Principal Investigator |
Yoshimura Jin 静岡大学, 創造科学技術大学院, 教授 (10291957)
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| Co-Investigator(Kenkyū-buntansha) |
長谷川 英祐 北海道大学, 農学研究院, 准教授 (40301874)
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
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| Keywords | 動的行動 / 動的ゲーム理論 / 変動環境 / 動的最適化 / 存続システム / 行動学 / 確率論 / 進化 / 環境変動 / 生態学 / 動的計画法 / 動的最適化モデル / 意思決定 / 幾何平均適応度 |
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| Outline of Final Research Achievements |
By analyzing the nature of the game derived from the dynamic decision making theory, we clarified that it differs from the result of the conventional game. We also found that the best choice changes dynamically depending on the player's wealth. In particular, we found that people with lower wealth (poor) are more likely to choose cooperative action. Furthermore, we have mathematically proved that the universal cheating on female birds can be explained by the risk spreading to avoid infertile males. Furthermore, it was clarified that the variability of the environment promotes the coexistence of many species in various communities. As mentioned above, it is clarified that the conventional adaptation concept needs a big change in consideration of environmental uncertainty.
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| Academic Significance and Societal Importance of the Research Achievements |
環境不確定性を考慮すると従来の生物学の基本概念である平均適応度が使えないことを、動的行動や動的ゲーム理論により示したことは、生物学や引いては経済学・経営科学へも影響する大きな学術的成果である。たとえば、ゲーム理論での動的最適化では、従来のゲーム理論が静的ゲームの擬似的な動的解であり、本質的には動的でないことを示した。この改革は、生物科学・社会科学や金融工学など大きな社会的変革を示唆する重要な成果と言える。
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Report
(5 results)
Research Products
(76 results)
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[Journal Article] Nature of collective decision-making by simple yes/no decision units2017
Author(s)
Hasegawa, E., Mizumoto, N., Kobayashi, K., Dobata, S., Yoshimura, J., Watanabe, S., Murakami, Y., Matsuura, K.
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Journal Title
Scientific Reports
Volume: 7
Issue: 1
Pages: 14436-14436
DOI
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Peer Reviewed / Open Access
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[Journal Article] A GIS-based map of periodical cicada Brood XIII in 2007, with notes on adjacent populations of Broods III and X (Hemiptera: Magicicada spp.).2016
Author(s)
Cooley, J. R., G. Kritsky, D. C. Marshall, K. B. R. Hill, G. J. Bunker, M. L. Neckermann, J. Yoshimura, J. E. Cooley, and C. Simon
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Journal Title
The American Entomologist
Volume: 62
Pages: 241-246
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Seasonal induction of alternative principal pathway for rose flower scent.2016
Author(s)
Hirata, H., Ohnishi, T., Tomida, K., Ishida, H., Kanda, M., Sakai, M., Yoshimura, J., Suzuki, H., Ishikawa, T., Dohra, H., Watanabe, N
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Journal Title
Sci. Rep.
Volume: 6
Issue: 1
Pages: 1-9
DOI
NAID
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Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] The contribution of seed dispersers to tree species diversity in tropical rainforests.2015
Author(s)
Kakishima S, Morita S, Yoshida K, Ishida A, Hayashi S, Asami T, Ito H, Miller DG, Uehara T, Mori S, Hasegawa E, Matsuura K, Kasuya E, Yoshimura J.
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Journal Title
Royal Society Open Science
Volume: 2
Issue: 10
Pages: 1-11
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Microhabitat locality allows multi-species coexistence in terrestrial plant communities.2015
Author(s)
Tubay JM, Suzuki K, Uehara T, Kakishima S, Ito H, Ishida A, Yoshida K, Mori S, Rabajante JF, Morita S, Yokozawa M, Yoshimura J.
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Journal Title
Scientific Reports
Volume: 5
Issue: 1
Pages: 1-9
DOI
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Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] The Distribution of Periodical Cicada (Hemiptera: Cicadidae:Magicicada) Brood II in 2013: Disjunct Emergences Suggest Complex Brood Origins.2015
Author(s)
Cooley JR, Simon C, Maier CT, Marshall D, Yoshimura J, Chiswell SM, Edwards M, Holliday C, Grantham R, Zyla J, Sanders RL, Neckermann M, Bunker G.
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Journal Title
American Entomologist
Volume: 61
Issue: 4
Pages: 245-251
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Book] 素数のきほん2018
Author(s)
吉村 仁、上野健爾、太田和夫
Total Pages
62
Publisher
株式会社ニュートンプレス
ISBN
9784315520934
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