prj-gsss3 のすべての投稿

2020/1/27 ワークショップ:世代間利他意識と世代間衡平をめぐって

日時: 2020年1月27日(月) 15:00~19:00

場所: 名古屋大学全学教育棟2階215室


15:00 – 15:45 千葉清史「事実と規範の区別:学際的経済学研究のために」

15:45 – 16:30 野村康「認識論と環境学:批判的実在論と気候変動を中心に」

16:30 – 16:45 コーヒーブレイク

16:45 – 17:30 隠岐さや香「学際的研究と政治対立:歴史的事例からの考察」

17:30 – 19:00 討議

2018/12/11 セミナー:再生可能エネルギーの普及と電力小売り事業-コープデリ生協連合の取り組み


開催日: 12/11 (火)
場所:早稲田大学 早稲田キャンパス14号館10階1046
時間:16:30 ~ 18:00
報告者:藤田親継(コープデリ生活協同組合連合会 常務理事(総合企画)


2018/11/06 環境経済学ワークショップ:持続可能性の条件と指標

開催日: 11/6 (火)
場所:早稲田大学 早稲田キャンパス14号館804号
時間:15:00 ~ 18:00

1.開会 15:00
2.第1報告 15:05 ~ 16:20
報告者:赤尾健一 (早稲田大学)
タイトル:Critical Capital Stock in a Continuous-Time Growth Model with a Convex-Concave Production Function

休憩 16:20 ~ 16:30

3.第2報告 16:30 ~ 17:45
報告者:馬奈木俊介 (九州大学)
タイトル: Beyond GDP?: Environment, Society and Welfare



  • Critical capital stock in a continuous time growth model with a convex–concave production function
The critical capital stock is a threshold that appears in a nonconcave growth model such that any optimal capital path from a stock level below the threshold converges to a lower steady state, whereas any optimal capital path from a stock level above the threshold converges to a higher steady state. The existence implies history dependent development and polarization. Unlike a concave model with wealth effect, the threshold is rarely an optimal steady state and thus is hard to characterize. In a continuous time growth model with a convex--concave production function, we show that: a) the critical capital stock is continuous and strictly increasing in the discount rate; b) it appears from the zero stock level and disappears at a stock level between ones of the maximum average productivity and the maximum marginal productivity; c) at this upper bound, it merges with the higher optimal steady state; d) once the critical capital stock disappears, the higher steady state is no longer an optimal steady state; and e) the critical capital stock at the upper bound can be arbitrarily close to either stock level of the maximum average productivity or the maximum marginal productivity, depending on the curvature of the utility function.
  • Beyond GDP?: Environment, Society and Welfare
The Inclusive Wealth Index is a new way of measuring a nation’s wealth, taking into account human capital (education, skills, earning potential, life expectancy, and population) and natural capital (fossil fuels, minerals, forest resources, fishery, and land), as well as produced capital (roads, railroad tracks, buildings, vehicles, machineries, etc.). This is a more comprehensive index than previous ones such as GDP, which measures income, and HDI, which incorporates education and life expectancy in addition to income. In our new UN published report, as a director of the report on 140 countries from 1990, I provide the valuable insights into investment strategies of countries on nature, health, education and demonstrates the use of the Inclusive Wealth Index as a key indicator for sustainable, stronger, and more peaceful development. This provides message to inclusive growth discussion on SDGs framework.




Environmental Issues and Nonlinear Dynamics

Institute for Advanced Social Sciences, Waseda University (IASS).