Maxime Cohen appointed Associate Editor of Management Science
Maxime Cohen, Associate Professor of Retail Management and Operations Management, was recently appointed Associate Editor of Management Science
The Role of Decision Support Systems in Attenuating Racial Biases in Healthcare Delivery
Authors: Kartik K. Ganju, Hilal Atasoy, Brad Greenwood and Jeff McCullough
Publication: Management Science, Volume 66, Issue 11, November 2020, Pages 5171-5181.
Abstract:
Although significant research has examined how technology can intensify racial and other outgroup biases, limited work has investigated the role information systems can play in abating them. Racial biases are particularly worrisome in healthcare, where underrepresented minorities suffer disparities in access to care, quality of care, and clinical outcomes. In this paper, we examine the role clinical decision support systems (CDSS) play in attenuating systematic biases among black patients, relative to white patients, in rates of amputation and revascularization stemming from diabetes mellitus. Using a panel of inpatient data and a difference-in-difference approach, results suggest that CDSS adoption significantly shrinks disparities in amputation rates across white and black patients鈥攚ith no evidence that this change is simply delaying eventual amputations. Results suggest that this effect is driven by changes in treatment care protocols that match patients to appropriate specialists, rather than altering within physician decision making. These findings highlight the role information systems and digitized patient care can play in promoting unbiased decision making by structuring and standardizing care procedures.
Cross-Listings and the Dynamics between Credit and Equity Returns
Authors: Patrick Augustin, Feng Jiao, Sergei Sarkissian, Michael J Schill
Publication: The Review of Financial Studies, Vol. 33, Issue 1, January 2020
Abstract:
We study how listing in multiple markets affects the dynamics between firms鈥� credit default swap (CDS) and stock returns. We find that cross-listing increases (1) the sensitivity of CDS to stock returns, (2) the integration of CDS with world equity and bond markets, and (3) the statistical synchronicity of CDS and stock prices. Our results are stronger for firms with greater media attention, analyst and CDS coverage, and Google search intensity and for listings in familiar markets. We suggest that a firm鈥檚 presence in global equity markets comes with an improvement in the credit-equity integration through a reduction of informational frictions.
Sovereign credit risk and exchange rates: Evidence from CDS quanto spreads
Authors: Patrick Augustin, Mikhail Chernov and Dongho Song
Publication: Journal of Financial Economics, Forthcoming
Abstract:
Sovereign CDS quanto spreads tell us how financial markets view the interaction between a country鈥檚 likelihood of default and associated currency devaluations (the Twin Ds). A no-arbitrage model applied to the term structure of Eurozone quanto spreads can isolate the Twin Ds and gauge the associated risk premiums. Conditional on the occurrence of default, the true and risk-adjusted 1-week probabilities of devaluation are 42% (2%) and 90% (55%) for the core (periphery) countries. The weekly risk premium for Euro devaluation in case of default for the core (periphery) exceeds the regular currency premium by up to 18 (13) basis points.
Measuring sovereign bond market integration
Authors: Ines Chaieb, Vihang Errunza, and Rajna Gibson Brandon
Publication: The Review of Financial Studies, Forthcoming
Abstract:
There is significant heterogeneity in the degree and dynamics of sovereign bond market integration across 21 developed and 18 emerging countries. We show that better spanning can significantly enhance market integration through local risk premia dissipation. Integration of the sovereign bond markets increases on average by about 10%, when a country moves from the 25th percentile to the 75th percentile as a result of higher political stability and credit quality, lower inflation and inflation risk, and lower illiquidity. The 10% increase in integration leads to, on average, a decrease in the sovereign cost of funding of about 1% per annum.
Sharing is caring: Social support provision and companionship activities in healthcare virtual support communities
Authors: K.-Y. Huang, I. Chengalur-Smith, and Alain Pinsonneault
Publication: MIS Quarterly: Management Information Systems, Volume 43, Issue 2, June 2019, Pages 395-423
Abstract:
Individuals increasingly rely on healthcare virtual support communities (HVSCs) for social support and companionship. While research provides interesting insights into the drivers of informational support in knowledge-sharing virtual communities, there is limited research on the antecedents of emotional support provision and companionship activities in HVSCs. The unique characteristics of HVSCs also justify the need to reexamine members鈥� voluntary provisions of help in such communities. This paper develops a model that examines the relationships between the structural, relational, and cognitive dimensions of social capital and the provision of informational and emotional support, and engagement in companionship activities in HVSCs. The model is tested based on data generated through an automated method that classifies and analyzes user-generated text in three healthcare virtual support communities (breast, prostate, and colorectal cancer). The results show that all three dimensions of social capital impact the provision of emotional support; both structural and relational capital facilitate engagement in companionship activities; and only cognitive capital enables the provision of informational support. Research and practical implications on the need to facilitate informational and emotional support provision and companionship activities in healthcare virtual support communities are discussed.
What users do besides problem-focused coping when facing IT security threats: An emotion-focused coping perspective
Authors: H. Liang, Y. Xue, Alain Pinsonneault and Y. Wu
Publication: MIS Quarterly: Management Information Systems, Volume 43, Issue 2, June 2019, Pages 373-394
Abstract:
This paper investigates how individuals cope with IT security threats by taking into account both problem-focused and emotion-focused coping. While problem-focused coping (PFC) has been extensively studied in the IT security literature, little is known about emotion-focused coping (EFC). We propose that individuals employ both PFC and EFC to volitionally cope with IT security threats, and conceptually classify EFC into two categories: inward and outward. Our research model is tested by two studies: an experiment with 140 individuals and a survey of 934 respondents. Our results indicate that both inward EFC and outward EFC are stimulated by perceived threat, but that only inward EFC is reduced by perceived avoidability. Interestingly, inward EFC and outward EFC are found to have opposite effects on PFC. While inward EFC impedes PFC, outward EFC facilitates PFC. By integrating both EFC and PFC in a single model, we provide a more complete understanding of individual behavior under IT security threats. Moreover, by theorizing two categories of EFC and showing their opposing effects on users鈥� security behaviors, we further examine the paradoxical relationship between EFC and PFC, thus making an important contribution to IT security research and practice.
How does the implementation of enterprise information systems affect a professional's mobility? An empirical study
Authors: Brad N. Greenwood, Kartik K. Ganju and Corey M. Angst
Publication: Information Systems Research, Vol. 30, No. 2, June 2019, Pages 563-594
Abstract:
Although significant research has examined the effect of enterprise information systems on the behavior and careers of employees, the majority of this work has been devoted to the study of blue- and gray-collar workers, with little attention paid to the transformative effect information technology may have on high-status professionals. In this paper, we begin to bridge this gap by examining how highly skilled professionals react to the increasing presence of enterprise systems within their organizations. Specifically, we investigate how the implementation of enterprise systems-in the form of electronic health records-affects the decision of physicians to continue practicing at their current hospital. Results suggest that when enterprise systems create complementarities for professionals, their duration of practice at the organization increases significantly. However, when technologies are disruptive and force professionals to alter their routines, there is a pronounced exodus from the organization. Interestingly, these effects are strongly moderated by individual and organizational characteristics, such as the degree of firm-specific human capital, local competition, and the prevalence of past disruptions, but are not associated with accelerated retirement or the strategic poaching of talent by competing organizations.
Yu Ma article selected as a聽finalist聽2019 Paul E. Green Award
Congratulations to Yu Ma,聽Associate Professor of Marketing and Bensadoun Scholar,聽 whose article 鈥淭he Club Store Effect: Impact of Shopping in Warehouse Club Stores on Consumers' Packaged Food Purchases鈥� has been聽selected as one of four finalists for the Journal of Marketing Research鈥檚 2019 Paul E. Green Award
The Paul E. Green Award recognizes the best article in the Journal of Marketing Research within the last calendar year that demonstrates the most potential to contribute significantly to the practice of marketing research.
Publication: Journal of Marketing Research, Vol. 55, No. 2, April 2018
Authors: Kusum L. Ailawadi, Yu Ma and Dhruv Grewal
This article studies the impact of shopping at the warehouse club format on households' packaged food-for-home purchases. In addition to low prices, this format has several unique characteristics that can influence packaged food purchases. The empirical analysis uses a combination of households' longitudinal grocery purchase information, rich survey data, and detailed item-level nutrition information. After accounting for selection on observables and unobservables, the authors find a substantial increase in the total quantity (servings per capita) of purchases attributable to shopping at this format. Because there is no effect on quality of purchases, this translates into a substantial increase in calories, sugar, and saturated fat per capita. The increase comes primarily from storable and impulse foods and it is drawn equally from foods that have positive and negative health halos. The results have important implications for how marketers can create win鈥搘in opportunities for themselves and for consumers.
Collective Information System Use: A Typological Theory
Authors: Bogdan Negoita, Liette Lapointe and Suzanne Rivard
Publication: MIS Quarterly, Vol. 42 Issue 4, 1281-1301, 2018
Abstract:
As the nature of information systems (IS) has evolved from primarily standalone, to enterprise, and distributed applications, the need for a better understanding of collective IS use has become a research and practical necessity. In view of contributing to this understanding, we conceptually define collective IS use as a unit level construct, rooted in instances of individual-level IS use within the context of a common work process. Its emergence from the individual to the unit level is shaped by different configurations of task, user, and system interdependence between instances of individual-level IS use. On the basis of this definition, we propose a typology of collective IS use that comprises four ideal types, namely siloed use, processual use, coalesced use, and networked use. For each ideal type, we theorize on the emergence process from the individual to the unit level and we consider the measurement implications for each.
A Primal-Dual Lifting Scheme for Two-Stage Robust Optimization
Authors: Angelos Georghiou, Angelos Tsoukalas, Wolfram Wiesemann
Publication:聽Operations Research, Forthcoming
础产蝉迟谤补肠迟:听
Two-stage robust optimization problems, in which decisions are taken both in anticipation of and in response to the observation of an unknown parameter vector from within an uncertainty set, are notoriously challenging. In this paper, we develop convergent hierarchies of primal (conservative) and dual (progressive) bounds for these problems that trade off the competing goals of tractability and optimality: While the coarsest bounds recover a tractable but suboptimal affine decision rule approximation of the two-stage robust optimization problem, the refined bounds lift extreme points of the uncertainty set until an exact but intractable extreme point reformulation of the problem is obtained. Based on these bounds, we propose a primal-dual lifting scheme for the solution of two-stage robust optimization problems that accommodates for generic polyhedral uncertainty sets, infeasible problem instances as well as the absence of a relatively complete recourse. The incumbent solutions in each step of our algorithm afford rigorous error bounds, and they can be interpreted as piecewise affine decision rules. We illustrate the performance of our algorithm on illustrative examples and on an inventory management problem.
Professor Ramaprasad appointed Associate Editor of Management Science
Jui Ramaprasad, Associate Professor in Information Systems, was recently appointed as Associate Editor to Management Science.
Extrinsic versus Intrinsic Rewards for Contributing Reviews in an Online Platform
Authors: Warut Khern-am-nuai, Karthik Kannan, Hossein Ghasemkhani
Publication: Information Systems Research, Forthcoming
础产蝉迟谤补肠迟:听
Firms have considered various forms of incentives for writing reviews, including the use of extrinsic rewards to attract reviewers. Building on this literature, we study the implications of monetary incentives on online reviews in the context of a natural experiment, where one review platform suddenly began offering monetary incentives for writing reviews. We refer to this as the treated platform. Along with data from Amazon.com and using the difference-in-differences approach, we compare the quantity and quality of reviews before and after rewards were introduced in the treated platform. We find that reviews are significantly more positive but that the quality decreases. Taking advantage of the panel data, we also evaluate the effect of rewards on existing reviewers. We find that their level of participation after monetary incentives decreases but not their quality of participation. Last, even though the platform enjoys an increase in the number of new reviewers, disproportionately more reviews appear to be written for highly rated products.
Read abstract: Information Systems Research
Robust Dual Dynamic Programming
Authors:聽Angelos Georghiou, Angelos Tsoukalas, Wolfram Wiesemann
Publication:聽Operations Research, Forthcoming
础产蝉迟谤补肠迟:听
Multi-stage robust optimization problems, where the decision maker can dynamically react to consecutively observed realizations of the uncertain problem parameters, pose formidable theoretical and computational challenges. As a result, the existing solution approaches for this problem class typically determine suboptimal solutions under restrictive assumptions. In this paper, we propose a robust dual dynamic programming (RDDP) scheme for multi-stage robust optimization problems. The RDDP scheme takes advantage of the decomposable nature of these problems by bounding the costs arising in the future stages through lower and upper cost to-go functions. For problems with uncertain technology matrices and/or constraint right-hand sides, our RDDP scheme determines an optimal solution in finite time. If also the objective function and/or the recourse matrices are uncertain, our method converges asymptotically (but deterministically) to an optimal solution. Our RDDP scheme does not require a relatively complete recourse, and it offers deterministic upper and lower bounds throughout the execution of the algorithm. We demonstrate the promising performance of our algorithm in a stylized inventory management problem.
The Effects of Analyst鈥怌ountry Institutions on Biased Research: Evidence from Target Prices
Authors:聽Mark T. Bradshaw, Alan G. Huang, Hongping Tan
Publication:聽Journal of Accounting Research, Forthcoming
础产蝉迟谤补肠迟:听
Prior research demonstrates that a strong institutional infrastructure in a country moderates self鈥恠erving behavior of market participants. Cross鈥恈ountry economic activities have increased significantly, presenting a research opportunity to examine the relative influence of local versus foreign institutional infrastructure on individual market participants. We utilize variation in analyst鈥恈ountry location relative to covered firm location to examine institutional determinants of optimism in analyst research. Focusing on target prices, where persistent optimism is well documented, we find that analysts domiciled in countries with stronger institutional infrastructures exhibit significantly attenuated target price optimism and more value鈥恟elevant target prices. Our results demonstrate the importance of domestic country鈥恖evel institutional factors in moderating self鈥恠erving behavior of market participants engaged in cross鈥恈ountry activities.
