The Second Generation DEA

本研究包括两个部分：（1）生产经济学与DEA的边界区域;（2）博弈论与DEA。关于第一个研究目标，我们研究了规模经济和拥塞。为此，我们成功地在非参数框架中定义了规模经济的程度，并表明规模经济的负程度表明拥挤。所以，我们完全解决了这个问题。该结果发表在EJOR（2004）论文中。此外，我们调查了印度人寿保险公司的成本效率，使用新的成本效率模型在Tone（2001）JOR论文。研究结果发表在SEPS（2005）论文中。作为DEA和AHP的组合，我们将它们应用于一个比较网站的评估研究，日本政府机构搬迁出东京，并固定两个最有前途的网站。研究结果发表在SEPS（2003）论文中。作为<th>第二个研究课题，我们将DEA的基本概念引入合作博弈理论，建立了DEA博弈模型。该方案有助于在多准则环境下达成参与者的共识。研究结果将发表在《Omega》（国际管理科学杂志）上。

This research consists of two parts : (i)boundary area between production economics and DEA, and (2)game theory and DEA. Regarding the first research objective, we studied scale economies and congestion. For this purpose, we succeeded in defining the degree of scale economies in the non-parametric framework and showed that a negative degree of scale economies indicates congestion. So, we completely solved this problem. This results were published in EJOR (2004) paper. Furthermore, we investigated cost efficiency of Life Insurance Corporation of India using the new cost efficiency model developed in Tone (2001) JOR paper. The results were published in SEPS (2005) paper. As a combination of DEA and AHP, we applied them for a comparative site evaluation study for relocating Japanese government agencies out of Tokyo and fixed two most promising sites. The results were published in SEPS (2003) paper. This paper raked as the 16^<th> in Top 25 Hottest Articles in SEPS.As the second research subject, we incorporated the basic concept of DEA into cooperative game theory and created DEA Game. This scheme can contribute to make a consensus among players under multiple criteria environment The results will be published in Omega (International Journal of Management Science).