Balanced portfolio via signed graphs and spectral clustering in the Brazilian stock market

Quality & Quantity - A portfolio associated with a balanced signed graph that contains both positive and negative edges is more predictable and risk-averse, and is therefore likely to require...     

Information technology impact on market orientation in e-business

This study presents how information technology (IT) contributes to market orientation (MO). The authors analyze the way companies deal with market intelligence to facilitate the identification of customer needs and to generate the appropriate response to such needs. Research methodology includes multiple case studies of retail companies with e-business operations (the three largest in Brazil). The findings indicate that investment in interorganizational systems strongly supports the development of MO capabilities. The article develops a framework to help companies in assessing how IT applications support their MO behaviors; as an academic contribution, the study presents two hypotheses for future studies.     

Management of perceptions of information technology service quality

The present study evaluates the perception gaps of service quality between information technology (IT) service providers and their clients. IT services require high investments, which make analyzing its effectiveness increasingly important. To do this analysis, this study uses the instrument SERVPERF of the SERVQUAL model. The research took place in a large Brazilian retail bank, which identified gaps in perceptions between IT service providers and its clients. The findings suggest opportunities for improvement in the quality of IT services from a strategic alignment perspective, particularly in the following dimensions: tangibles, reliability, responsiveness, assurance, and empathy. The study also indicates some enhancements for the SERVQUAL model.