The Experts below are selected from a list of 198810 Experts worldwide ranked by ideXlab platform
Michael D Whinston - One of the best experts on this subject based on the ideXlab platform.
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on the transaction cost determinants of vertical Integration
Journal of Law Economics & Organization, 2003Co-Authors: Michael D WhinstonAbstract:The transaction cost approach to the organization of firms has been among the most significant advances in industrial organization in the last 25 years. Much of this work has taken the transaction cost economics view of Williamson (1975, 1979, 1985) and Klein, Crawford, and Alchian (1978) in which high levels of quasi-rents are taken to increase the likelihood of vertical Integration. More recently, however, the more formal property rights Theory of Grossman and Hart (1986) and Hart and Moore (1990) has received considerable attention as a Theory of Integration. This article explores the predictions of property rights Theory to assess what the extensive supporting evidence on transaction cost economics tells us about the property rights Theory’s empirical relevance. The article concludes that this evidence sheds little light on the relevance of the property rights Theory and discusses how we might try to learn more.
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on the transaction cost determinants of vertical Integration
2002Co-Authors: Michael D WhinstonAbstract:The transaction cost approach to the organization of firms has been among the most significant advances in industrial organization in the last twenty-five years. Much of this work has taken the Transaction Cost Economics view of Williamson (1975, 1979, 1985) and Klein, Crawford, and Alchian (1978) in which high levels of quasi-rents are taken to increase the likelihood of vertical Integration. More recently, however, the more formal Property Rights Theory due to Grossman and Hart (1986) and Hart and Moore (1990) has received considerable attention as a Theory of Integration. This paper explores the predictions of Property Rights Theory to assess what the extensive supporting evidence on Transaction Costs Economics tells us about the Property Rights Theory's empirical relevance. The paper concludes that this evidence sheds little light on the relevance of the Property Rights Theory and discusses how we might try to learn more.
Karlsen, Erik Hove - One of the best experts on this subject based on the ideXlab platform.
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On the approximation of Lévy driven Volterra processes and their integrals
'Elsevier BV', 2019Co-Authors: Di Nunno Giulia, Fiacco Andrea, Karlsen, Erik HoveAbstract:Volterra processes appear in several applications ranging from turbulence to energy finance where they are used in the modelling of e.g.temperatures and wind and the related financial derivatives. Volterra processes are in general non-semimartingales and a Theory of Integration with respect to such processes is in fact not standard. In this work we suggest to construct an approximating sequence of Lévy driven Volterra processes, by perturbation of the kernel function. In this way,one can obtain an approximating sequence of semimartingales. Then we consider fractional Integration with respect to Volterra processes as integrators and we study the corresponding approximations of the fractional integrals. We illustrate the approach presenting the specific study of the Gamma-Volterra processes. Examples and illustrations via simulation are given
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On the approximation of Lévy driven Volterra processes and their integrals
'Elsevier BV', 2019Co-Authors: Di Nunno Giulia, Fiacco Andrea, Karlsen, Erik HoveAbstract:Volterra processes appear in several applications ranging from turbulence to energy finance where they are used in the modelling of e.g.temperatures and wind and the related financial derivatives. Volterra processes are in general non-semimartingales and a Theory of Integration with respect to such processes is in fact not standard. In this work we suggest to construct an approximating sequence of Lévy driven Volterra processes, by perturbation of the kernel function. In this way,one can obtain an approximating sequence of semimartingales. Then we consider fractional Integration with respect to Volterra processes as integrators and we study the corresponding approximations of the fractional integrals. We illustrate the approach presenting the specific study of the Gamma-Volterra processes. Examples and illustrations via simulation are given.submittedVersio
Russell S Phillips - One of the best experts on this subject based on the ideXlab platform.
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a comprehensive Theory of Integration
Medical Care Research and Review, 2020Co-Authors: Sara J Singer, Michaela Kerrissey, Mark W Friedberg, Russell S PhillipsAbstract:Efforts to transform health care delivery to improve care have increasingly focused on care Integration. However, variation in how Integration is defined has complicated efforts to design, synthesize, and compare studies of Integration in health care. Evaluations of Integration initiatives would be enhanced by describing them according to clear definitions of Integration and specifying which empirical relationships they seek to test—whether among types of Integration or between Integration and outcomes of care. Drawing on previous work, we present a comprehensive theoretical model of relationships between types of Integration and propose how to measure them.
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a theoretical logic model of Integration in health care
International Journal of Integrated Care, 2017Co-Authors: Michaela Kerrissey, Mark W Friedberg, Russell S Phillips, Anna D Sinaiko, Tsega Tamene, Bethany Maylone, Sara J SingerAbstract:Introduction: Recent literature has described key dimensions of Integration within health care organizations but has not explored relationships among them. Clarifying these relationships can improve efforts to compare and contrast studies of “Integration” in health care. Methods: To construct a novel Theory of Integration, we reviewed existing publications from health care and management literature. We synthesized and adapted elements from disparate Integration frameworks in order to provide a more complete and contemporary representation relevant to the US healthcare context. The theoretical model was refined based on feedback from academic experts and clinical practitioners. Results: We defined Integration as “planned, thoughtful design of the care process for the benefit and protection of the patient” (Bohmer, Lawrence, & Singer, 2012), and we considered patient care to be integrated when it is coordinated (across professionals, facilities, support systems, over time, between visits) and tailored to patient and family needs, values, and preferences (Singer et al., 2011). We developed a logic model identifying five forms of Integration as well as contextual factors that might affect Integration and the outcomes that Integration should theoretically produce. The five forms of Integration include structural, functional, normative, interpersonal, and clinical. Structural and functional forms refer to organizational features such as governance structures and financial management, respectively, while interpersonal and clinical forms describe people and processes, such as teamwork and use of shared care plans (Nolte & McKee 2008; Shortell et al., 2008; Singer et al., 2011; Valentijn et al., 2013; van der Klauw et al. 2014). We define normative Integration as the establishment and maintenance of a common culture and norms across units and organizations within a health system, and depict it as cutting across the other forms of Integration (Valentijn et al., 2015). Contextual factors that might affect Integration include external factors such as market structure and internal organizational factors like financial arrangements. Outcomes that Integration might theoretically produce relate to health outcomes, clinical cost, patient experience and provider satisfaction. We suggest empirically testing a set of resulting hypotheses about the relationships among these dimensions of integrated care: (1) contextual factors are typically precursors to structural, functional, normative, and clinical Integration; (2) greater structural and functional Integration are associated with greater Integration involving people and processes (interpersonal and clinical Integration); (3) interpersonal and clinical Integration produce better-integrated patient care, yielding superior health outcomes. We explore why results may be mixed for clinical cost, patient experience and provider satisfaction. Discussion/conclusions: We present a novel, comprehensive logic model of care Integration. As provider organizations in the US and elsewhere seek to better integrate care amid limited budgets, understanding relationships among elements of Integration, context, and outcomes will inform decisions about resource allocation, implementation, and evaluation. Limitations: This model is theoretically derived and requires empirical testing. Suggestions for future research: This Integration model can serve as a theoretical basis for future empirical research exploring the relationships among elements of integrated care and outcomes. References: 1- Bohmer, R., Lawrence, D., & Singer, S. J. Order from Chaos: Accelerating Care Integration (pp. 1–34). Boston, MA: Lucian Leape Institute and the National Patient Safety Foundation. 2012 2- Nolte E & McKee, M. (Eds.). Caring for people with chronic conditions. A health system perspective. Berkshire, England: Open University Press. 2008 3- Shortell SM, Gillies RR, & Anderson DA. Remaking healthcare in America (2nd ed). San Francisco, CA: Jossey-Bass. 2000 4- Singer SJ, Burgers J, Friedberg M, Rosenthal M, Leape L, Schneider E. "Defining and measuring integrated patient care: promoting the next frontier in health care delivery." Medical Care Research and Review 2011;68.1: 112-127. 5- Valentijn, P. P., Schepman, S. M., Opheij, W., & Bruijnzeels, M. A. Understanding integrated care: a comprehensive conceptual framework based on the integrative functions of primary care. International Journal of Integrated Care, 13, e010. 2013 6- Valentijn, P., Boesveld, I., Klauw, Denise van der, Ruwaard, D., Strujis, J., Molema, J., Brujinzeels, M. and Vrijhoef Hubertus. “Towards a taxonomy for integrated care: a mixed-methods study,” International Journal of Integrated Care, Vol. 15. 2015 7- Van der Klauw D, Molema H, Grooten L, Vrijhoef H. “Identification of mechanisms enabling integrated care for patients with chronic diseases: A literature review,” in International Journal of Integrated Care, Vol. 14. 2014
Di Nunno Giulia - One of the best experts on this subject based on the ideXlab platform.
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On the approximation of Lévy driven Volterra processes and their integrals
'Elsevier BV', 2019Co-Authors: Di Nunno Giulia, Fiacco Andrea, Karlsen, Erik HoveAbstract:Volterra processes appear in several applications ranging from turbulence to energy finance where they are used in the modelling of e.g.temperatures and wind and the related financial derivatives. Volterra processes are in general non-semimartingales and a Theory of Integration with respect to such processes is in fact not standard. In this work we suggest to construct an approximating sequence of Lévy driven Volterra processes, by perturbation of the kernel function. In this way,one can obtain an approximating sequence of semimartingales. Then we consider fractional Integration with respect to Volterra processes as integrators and we study the corresponding approximations of the fractional integrals. We illustrate the approach presenting the specific study of the Gamma-Volterra processes. Examples and illustrations via simulation are given
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On the approximation of Lévy driven Volterra processes and their integrals
'Elsevier BV', 2019Co-Authors: Di Nunno Giulia, Fiacco Andrea, Karlsen, Erik HoveAbstract:Volterra processes appear in several applications ranging from turbulence to energy finance where they are used in the modelling of e.g.temperatures and wind and the related financial derivatives. Volterra processes are in general non-semimartingales and a Theory of Integration with respect to such processes is in fact not standard. In this work we suggest to construct an approximating sequence of Lévy driven Volterra processes, by perturbation of the kernel function. In this way,one can obtain an approximating sequence of semimartingales. Then we consider fractional Integration with respect to Volterra processes as integrators and we study the corresponding approximations of the fractional integrals. We illustrate the approach presenting the specific study of the Gamma-Volterra processes. Examples and illustrations via simulation are given.submittedVersio
Sara J Singer - One of the best experts on this subject based on the ideXlab platform.
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a comprehensive Theory of Integration
Medical Care Research and Review, 2020Co-Authors: Sara J Singer, Michaela Kerrissey, Mark W Friedberg, Russell S PhillipsAbstract:Efforts to transform health care delivery to improve care have increasingly focused on care Integration. However, variation in how Integration is defined has complicated efforts to design, synthesize, and compare studies of Integration in health care. Evaluations of Integration initiatives would be enhanced by describing them according to clear definitions of Integration and specifying which empirical relationships they seek to test—whether among types of Integration or between Integration and outcomes of care. Drawing on previous work, we present a comprehensive theoretical model of relationships between types of Integration and propose how to measure them.
-
a theoretical logic model of Integration in health care
International Journal of Integrated Care, 2017Co-Authors: Michaela Kerrissey, Mark W Friedberg, Russell S Phillips, Anna D Sinaiko, Tsega Tamene, Bethany Maylone, Sara J SingerAbstract:Introduction: Recent literature has described key dimensions of Integration within health care organizations but has not explored relationships among them. Clarifying these relationships can improve efforts to compare and contrast studies of “Integration” in health care. Methods: To construct a novel Theory of Integration, we reviewed existing publications from health care and management literature. We synthesized and adapted elements from disparate Integration frameworks in order to provide a more complete and contemporary representation relevant to the US healthcare context. The theoretical model was refined based on feedback from academic experts and clinical practitioners. Results: We defined Integration as “planned, thoughtful design of the care process for the benefit and protection of the patient” (Bohmer, Lawrence, & Singer, 2012), and we considered patient care to be integrated when it is coordinated (across professionals, facilities, support systems, over time, between visits) and tailored to patient and family needs, values, and preferences (Singer et al., 2011). We developed a logic model identifying five forms of Integration as well as contextual factors that might affect Integration and the outcomes that Integration should theoretically produce. The five forms of Integration include structural, functional, normative, interpersonal, and clinical. Structural and functional forms refer to organizational features such as governance structures and financial management, respectively, while interpersonal and clinical forms describe people and processes, such as teamwork and use of shared care plans (Nolte & McKee 2008; Shortell et al., 2008; Singer et al., 2011; Valentijn et al., 2013; van der Klauw et al. 2014). We define normative Integration as the establishment and maintenance of a common culture and norms across units and organizations within a health system, and depict it as cutting across the other forms of Integration (Valentijn et al., 2015). Contextual factors that might affect Integration include external factors such as market structure and internal organizational factors like financial arrangements. Outcomes that Integration might theoretically produce relate to health outcomes, clinical cost, patient experience and provider satisfaction. We suggest empirically testing a set of resulting hypotheses about the relationships among these dimensions of integrated care: (1) contextual factors are typically precursors to structural, functional, normative, and clinical Integration; (2) greater structural and functional Integration are associated with greater Integration involving people and processes (interpersonal and clinical Integration); (3) interpersonal and clinical Integration produce better-integrated patient care, yielding superior health outcomes. We explore why results may be mixed for clinical cost, patient experience and provider satisfaction. Discussion/conclusions: We present a novel, comprehensive logic model of care Integration. As provider organizations in the US and elsewhere seek to better integrate care amid limited budgets, understanding relationships among elements of Integration, context, and outcomes will inform decisions about resource allocation, implementation, and evaluation. Limitations: This model is theoretically derived and requires empirical testing. Suggestions for future research: This Integration model can serve as a theoretical basis for future empirical research exploring the relationships among elements of integrated care and outcomes. References: 1- Bohmer, R., Lawrence, D., & Singer, S. J. Order from Chaos: Accelerating Care Integration (pp. 1–34). Boston, MA: Lucian Leape Institute and the National Patient Safety Foundation. 2012 2- Nolte E & McKee, M. (Eds.). Caring for people with chronic conditions. A health system perspective. Berkshire, England: Open University Press. 2008 3- Shortell SM, Gillies RR, & Anderson DA. Remaking healthcare in America (2nd ed). San Francisco, CA: Jossey-Bass. 2000 4- Singer SJ, Burgers J, Friedberg M, Rosenthal M, Leape L, Schneider E. "Defining and measuring integrated patient care: promoting the next frontier in health care delivery." Medical Care Research and Review 2011;68.1: 112-127. 5- Valentijn, P. P., Schepman, S. M., Opheij, W., & Bruijnzeels, M. A. Understanding integrated care: a comprehensive conceptual framework based on the integrative functions of primary care. International Journal of Integrated Care, 13, e010. 2013 6- Valentijn, P., Boesveld, I., Klauw, Denise van der, Ruwaard, D., Strujis, J., Molema, J., Brujinzeels, M. and Vrijhoef Hubertus. “Towards a taxonomy for integrated care: a mixed-methods study,” International Journal of Integrated Care, Vol. 15. 2015 7- Van der Klauw D, Molema H, Grooten L, Vrijhoef H. “Identification of mechanisms enabling integrated care for patients with chronic diseases: A literature review,” in International Journal of Integrated Care, Vol. 14. 2014
