Sulfonated poly(arylene ether sulfone) copolymer is synthesized via nucleophilic step polymerization of sulfonated 4,4′-dichlorodiphenyl sulfone, 4,4′-dichlorodiphenyl sulfone and phenolphthalin monomers in the presence of potassium carbonate. The copolymer is blended with various amounts of...

This article reviews the test of a home market model of international trade in media products using a movie industry database covering 6 major countries (the United States, Japan, Germany, Italy, France, and the United Kingdom) over the 1950 to 2003 period. In support of the model, this study...

Using a home market economic model, this article explains the changing competitive balance between the U.S. and Japanese film industries. I test the hypothesis that the domestic movies' market share in Japan has decreased because consumer movie spending has increased more rapidly in the United...

In this paper, examination of the possibility of a 'double marginalization' problem existing in the Korean telecommunication industry is conducted and suggestions are made for the provision of a new scheme to eliminate this possibility by changing the pricing system for fixed-to-mobile calls....

This article examines the welfare benefits of cable television (CATV) merger and acquisitions in the multi-channel video programming distribution (MVPD) market. In particular, it seeks to answer whether cable subscribers are better off in competitive markets than in concentrated markets. This...