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Luis G. Vargas
University of Pittsburgh
165Publications
35H-index
7,345Citations
Publications 165
Newest
#1Narayan Ramasubbu (University of Pittsburgh)H-Index: 15
#2Jennifer Shang (University of Pittsburgh)H-Index: 23
Last.Luis G. Vargas (University of Pittsburgh)H-Index: 35
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We conceptualize task interdependence between firms in outsourced service operations as an endogenous design choice made by the outsourcing firm. Then, utilizing relative firm efficiency and Tobin’...
#1José Ignacio Peláez (UMA: University of Málaga)H-Index: 9
Last.Luis G. Vargas (University of Pittsburgh)H-Index: 35
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Abstract The use of data obtained from social media in decision-making is growing, because people are increasingly using these means to inform themselves, express opinions or make valuations of brands, services, etc. Increasingly, people and organizations use this information to make strategic decisions for their business. This decision process involves, among other thing, obtaining a ranking of alternatives to support the decision. However, in many decision-making models the use of data is done...
#1Janice L. Pringle (University of Pittsburgh)H-Index: 10
#2Aleksandra Sasha Milicevic (University of Pittsburgh)H-Index: 2
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The current study evaluates changes in access as a result of the MyVA Access program—a system-wide effort to improve patient access in the Veterans Health Administration. Data on 20 different measures were collected, and changes were analyzed using t tests and Chow tests. Additionally, organizational health—how able a system is to create health care practice change—was evaluated for a sample of medical centers (n = 36) via phone interviews and surveys conducted with facility staff and technical ...
#1José Ignacio Peláez (UMA: University of Málaga)H-Index: 9
#2Eustaquio A. Martinez (University of the East)H-Index: 1
Last.Luis G. Vargas (University of Pittsburgh)H-Index: 35
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Technological advances and the Internet have changed the way consumers approach the market for assets and services. Increasingly, consumers use the opinions of others to make their decisions. Web sites have assessment indexes (ORIs, ORS), where consumers value products/services using discrete-value scales, like stars or likes. But these ways of assessing are being questioned for several reasons such as the answers’ reliability, and the opinions representativeness and aggregation. Lack of reliabi...
#1M. Gabriela Sava (Clemson University)H-Index: 1
#2Luis G. Vargas (University of Pittsburgh)H-Index: 35
Last.James G. Dolan (URMC: University of Rochester Medical Center)H-Index: 22
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Patients are faced with multiple alternatives when selecting the preferred method for colorectal cancer screening, and there are multiple criteria to be considered in the decision-making process. We model patients’ choices using a multicriteria decision model, specifically an Analytic Hierarchy Process-based model, and propose a new approach for characterizing the idiosyncratic preference regions for individual patients. The new approach involves the development of a personalized sensitivity and...
#1José Ignacio Peláez (UMA: University of Málaga)H-Index: 9
#2Francisco E. Cabrera (UMA: University of Málaga)
Last.Luis G. Vargas (University of Pittsburgh)H-Index: 35
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Abstract The purchasing process consists of multiple, non-isolated phases that describe the interactions between consumers and products. One of these phases is the evaluation of alternatives, in which the consumer compares the benefits that will be obtained from each product or service depending on a set of criteria. Recently, the rise of online ecosystems has fueled the development of new purchasing-decision prediction models (PDPM) based on the shared opinions, concerns, and expectations of cu...
#1M. Gabriela Sava (Clemson University)H-Index: 1
#2James G. Dolan (URMC: University of Rochester Medical Center)H-Index: 22
Last.Luis G. Vargas (University of Pittsburgh)H-Index: 35
view all 4 authors...
Background. Current colorectal cancer screening guidelines by the US Preventive Services Task Force endorse multiple options for average-risk patients and recommend that screening choices should be guided by individual patient preferences. Implementing these recommendations in practice is challenging because they depend on accurate and efficient elicitation and assessment of preferences from patients who are facing a novel task. Objective. To present a methodology for analyzing the sensitivity a...
This paper examines the concept, historical evolution and the different schools of thought regarding an aspect of one of the most productive and widely disseminated Operations Research disciplines of our time: Multiple Criteria Decision Making (MCDM). It analyses the development of the scientific method and new tendencies that have emerged in the context of the Knowledge Society. The work also considers future challenges in the field of MCDM, particularly in the context of one of the most popula...
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