7. Okumura M. and Tsukai M.: Business Service Location with Spatially Stochastic Demands: Agglomeration Economies Generated by the Intersection of Costs and Localized Uncertain Demand, in Charlie Karlsson, Borje Johansson, Kiyoshi Kobayashi and Roger R. Stough (eds.), “Knowledge, Innovation and Space”, Edward Elgar Publishing, pp.,2014.7.
6. Tsukai M., Ejiri R., Kobayashi K. and Okumura M.: Productivities of Infrastructure with Spillover Effects: A Study of Japan, in Karlsson, C., Anderson, W. Johansson, B. and Kobayashi, K.(eds.), “The Management and Measurement of Infrastructure”, Edward Elgar Publishing, pp. 99-126, 2007.11.
5. Okumura M. and Tsukai M.: A transportation telecommunication media split model considering complexity of interaction, in K. Kobayashi, T.R.Lakshmanan, W.P. Anderson (eds.), “Structural Change in Transportation and Communications in the Knowledge Society”, Edward Elgar Publishing, pp.165-182, 2006.12.
4. Okumura M. and Kobayashi K. : Disappearing distance in city systems, in A.E. Andersson, B.Johansson, W.P. Anderson (eds.), “The Economics of Disappearing Distance: In Honour of T.R. Lakshmanan, Gentleman and Scholar, Ashgate Publishing, pp.13-30, 2003.6, (presented at the European Summer Institute of the Regional Science Association, Munich, Germany 1998.8.)
2. M.Okumura and K.Yoshikawa: Measuring Horizontal Inter-industrial Linkages, in B.Johansson et al(eds.), “Patterns of a Network Economy”, Springer-Verlag, pp.187-204, 1994, (presented at a Workshop in Boston University, 1991).
1. M.Okumura, K.Yoshikawa and E.Hideshima: Optimal Regional Investment Control Using Hallmark Event, in A.Andersson et al.(eds.), “The Cosmo-creative Society”, Springer-Verlag, pp.263-280,1993, (presented at the International Colloquium for Creative Society in Kyoto,1990).