Informs 2015

273 / 552

INFORMS Philadelphia – 2015
271
3 - Co-opetition in Services: The Boardwalk Phenomenon
Lucy Gongtao Chen, National University of Singapore, 15 Kent
Ridge Drive, Singapore, Singapore, ,
Tinglong Dai, Nagesh Gavirneni, Xuchuan Yuan
We consider two service firms (e.g. restaurants) that compete on price and
waiting time and cooperate on entertainment effort that reduces the waiting cost
of the patrons. We study monopoly and duopoly settings and in the latter, we
consider both individual and joint entertainment efforts. We show that by
cooperating on entertainment, the competing service firms are able to achieve
efficiency levels equivalent to that of monopoly settings.
TA40
40- Room 101, CC
Behavioral Operations III
Contributed Session
Chair: Ling Li, Professor, Department Chair of IT, Old Dominion
University, 2064 Constant Hall, Norfolk, VA, 23529,
United States of America,
1 - Newsvendor Decision with Multiple Reference Points
Feng Li, Dr., South China University of Technology, Wushan
Road, Guangzhou, China, , Ying Wei
This paper studies how bottom line and status quo as reference profits influence
the newsvendor behavior and the optimal order quantity. Employing tri-reference
point theory, psychological value of the profit is regarded as gain, loss, or failure
based on the two benchmarks. We find that the presence of bottom line decreases
the optimal order quantity. In additon, the optimal order quantity may decrease
with the wholesale price and increase with the retail price.
2 - Prediction on Network Public Opinion in Online Communities of
Different Age Structures
Tianjiang Boning, Master, Huazhong University of Science and
Technology, 1037 Luoyu Road, Wuhan, HU, 430074, China,
We get the evolution law of different age structures in different internet public
opinion events through simulation and analysis, and analyze the effect of youth
group, middle-aged group and elderly group in each community on internet
public opinion respectively, and also find the special role that the elderly group
plays during the public opinion evolution processes. In the end, we propose some
effective suggestions for Government according to simulation results.
3 - Employees’ Cyber Security Behavior and Information
Security Policy
Ling Li, Professor, Department Chair of IT, Old Dominion
University, 2064 Constant Hall, Norfolk, VA, 23529,
United States of America, Li Xu, Wu He
This research focuses on cybersecurity by theoretically defining the conceptual
domains of employees’ online security behavior and beliefs. We examined the
relative importance of 10 factors that will be used for developing new training
methods and materials to improve employee’s awareness and skills to defend
against cybersecurity risks, and investigated the relationship between the
availability of cybersecurity policy and individual employee’s behavior and beliefs
toward cybersecurity issues.
TA41
41-Room 102A, CC
Studies in Healthcare Productivity
Sponsor: Manufacturing & Service Oper
Mgmt/Healthcare Operations
Sponsored Session
Chair: Robert Batt, Asst. Professor, Wisconsin School of Business, UW-
Madison, 975 University Ave., Grainger Hall, 5279, Madison, WI,
53706, United States of America,
1 - Mining for Content: A Study of E-visits
Hessam Bavafa, Assistant Professor, Wisconsin School of Business,
Madison, WI, United States of America,
We study the micro-structure of e-visits, electronic communications between
patients and providers through patient portals. The main promise of e-visits as a
new channel for providing primary care services is to decrease the number of
office visits and improve patient health. We examine detailed information about
the patients, providers, and e-visit details (e.g., timings and text of e-visits) to
establish a better understanding of e-visits.
2 - Pareto Improving Flow Control Policies for Multi-server
Emergency Departments - New Perspectives
Hung Do, Assistant Professor, University of Vermont,
55 Colchester Ave., Kalkin Hall 207, Burlington, VT, 05405,
United States of America, , Masha Shunko
Using Emergency Medical Services setting as motivation, we design and analyze
flow control policies for service systems with N multiple-server queues. We focus
on policies that improve performance of the system and benefit all involved
entities. We propose new perspectives on performance measures, novel methods
to comparatively analyze flow control policies and reveal managerial insights that
help design such Pareto improving policies in practice.
3 - Adopting Best Practices: Public Relative Performance Feedback
as a Tool for Standardizing Workflow
Hummy Song, Harvard University, Wyss House,
Soldiers Field Road, Boston, MA, 02163, United States of
America, , Karen Murrell, Anita Tucker,
David Vinson
In complex service systems, standardizing workflows (not processes) may be an
effective way to improve operational performance. We explore how public
disclosure of relative performance feedback (RPF) on individual workers’
processing times can help standardize workflow and improve productivity. We
examine the effect of public RPF on worker productivity and the extent to which
this varies by whether standardized processes are in place. We also explore
potential mechanisms driving these effects.
4 - The Disposition Decision: Handoffs and End-of-shift Effects in an
Emergency Department
Robert Batt, Asst. Professor, Wisconsin School of Business, UW-
Madison, 975 University Ave., Grainger Hall, 5279, Madison, WI,
53706, United States of America, , Diwas Kc,
Bradley Staats, Brian Patterson
We look at the effect of emergency department patients hand-offs on operational
variables such as length of stay, revisit rate, physician productivity. We also
examine what factors impact the probability of a patient being handed-off at the
end of a shift versus being dispositioned by the current doctor.
TA42
42-Room 102B, CC
Operational Decision Making in Healthcare
Sponsor: Manufacturing & Service Oper
Mgmt/Healthcare Operations
Sponsored Session
Chair: Vishal Ahuja, Southern Methodist University, P.O. Box 750333,
Dallas, TX, United States of America,
1 - Impact of Severity-adjusted Workload on Health Status of
Patients Discharged from an ICU
Song Hee Kim, Assistant Professor, Marshall School of Business,
University of Southern California, Los Angeles, CA, United States
of America, , Edieal Pinker,
Elizabeth Bradley, Joan Rimar
We examine whether workload has a direct impact on the health status of
patients discharged from ICUs, using data from two ICUs and a new measure of
patient acuity called the Rothman Index (RI). The RI is updated hourly in the
ICU, enabling us to track the health status of patients. Also, leveraging the RI, we
measure ICU workload in a novel way that takes into account not only the census
but also patient acuity, and study this severity-adjusted workload’s impact on the
patient disposition.
2 - Evidence of Strategic Behavior in Medicare Claims Reporting
Hamsa Bastani, Graduate Student, Stanford University,
United States of America, Joel Goh,
Mohsen Bayati
Upcoding is the practice where medical providers alter claims data to receive
increased reimbursement. Previous studies on detecting upcoding have been
limited by unobserved confounders (e.g. provider quality and patient risk). We
present a novel approach using a double regression that exploits state-level
variations in adverse event regulation and instrumental variables to provide
evidence of upcoding at a national scale. We also make several policy
recommendations for reducing upcoding.
TA42