As the network externality in an industrial organization has been widely discussed in recent years, many researchers in the field have noted a particular type of market, the so-called two-sided market. In a two-sided market, two or more groups of agents such as buyers and sellers interact while...

AbstractThe following sections are included:INTRODUCTIONBROADER CONCEPTS OF SECURITYJapan's concept of comprehensive securityRedefining the concept of security: “environmental security”THE ARCTIC AND JAPANThe Arctic's geopolitics: resources, peoples and the environmentThe main findings of...

We study a duopoly model of trade and its trade policy. The two country trade model to be discussed is the following. There are three goods (0,1 and 2). Good 0 is produced by perfectly competitive firms, and the good 1 and the good 2 are imperfect substitutes, each produced by a home and a...

In [6], Long and Katayama presented a model of exploitation of a common property resource, when agents can also invest in private and productive capital. They considered the case where the resource extracted from a common pool is non-renewable. In this paper, we try to extend their result to the...

A simple neo‐classical theory of the demand for capital goods service is presented to clarify the relationship between the marginal productivity of capital and Keynes′s concept of the marginal efficiency of capital. How the latter concept is related to con‐temporary understanding of the...