A goal programming/constrained regression review of the Bell system breakup
Management Science
Bankruptcy prediction using neural networks
Decision Support Systems - Special issue on neural networks for decision support
Information infrastructure development: international comparison between the United States and Japan
Telematics and Informatics - Special issue: Japanese and American approaches to building a national information infrastructure: a comparative approach
Divestiture of Nippon Telegraph and Telephone
Management Science
Credit rating analysis with support vector machines and neural networks: a market comparative study
Decision Support Systems - Special issue: Data mining for financial decision making
Decision Support Systems - Special issue: Data mining for financial decision making
Decision support systems unfrastructure: The root problems of the management of changing IT
Decision Support Systems
Composite quality of service and decision making perspectives in wireless networks
Decision Support Systems
The impact of information technology on the financial performance of diversified firms
Decision Support Systems - Special issue: Economics and information systems
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This study investigates the financial performance of the world telecommunications industry by DEA-DA (Data Envelopment Analysis-Discriminant Analysis). The proposed use of DEA-DA has a linkage with Altman's Z score that has long served as a methodological and conceptual basis in finance. Based upon the Z score of telecommunications companies, we rank them for financial assessment. After evaluating their financial performance of the firms, this study pays attention to the financial performance of AT&T (American Telephone & Telegraph) and NTT (Nippon Telegraph and Telephone) after their divestiture. This study finds that AT&T outperformed NTT because AT&T changed itself to an IT (Information Technology) company that provides wireless communications services and other IT services, but NTT separated IT and wireless services into the other companies after the breakup.