@article{oai:tokyo-metro-u.repo.nii.ac.jp:00002068, author = {カワシゲ, リュウイチロウ and kawashige, Ryuichiro and 河重, 隆一郎}, issue = {11}, journal = {経営と制度}, month = {Mar}, note = {In this article, the non-negativity constraint on the marginal production-cost binding, we show the range of the exogenous variables and the corner equilibrium as the outcome of the two-stage game in which two firms invest in their R&D to reduce the production-cost in the first stage and engage in the Cournot competition in the second stage. The marginal production-cost comes to zero when the constraint is binding it. The corner equilibrium caused by the marginal production-cost come to zero is inferior to the interior equilibrium resulted from the negative marginal production-cost not binded by the constraint. Seminal works, however, which stated the outcome of the co-operative R&D is better than that of the competitive R&D assumed to be an interior equilibrium and presented the equilibrium sought without the constraints. The result of the seminal works is still unclear. Therefore, we reexamine the two-stage game of R&D investment., Article}, pages = {19--34}, title = {費用の非負制約を考慮した研究開発の協力と競争}, year = {2013} }