抄録
Space development programs especially requires tighter international cooperation for its success because of special nature of space equipment manufacturing industry. To make clear this view point, authors introduce a concept of “Industrialization Threshold Level” defined by conjunction of unit price, Technology level, and investment with sales amount. It classifies the industry into matured industries and gevernment-supported industries. Plots of each country on the square of population and the square root of country dimensions show another aspect of the space industry. These two analysis emphasize the need of international cooperation on Space Programs.
