Informs 2015

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INFORMS Philadelphia – 2015
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3 - Organizational Structure of A Global Supply Chain in the
Presence of a Gray Market
Bosung Kim, Ph.d Student, KAIST(Korea Advanced Institute of
Science and Technology), 85 Hoegiro, Dongdaemun-Gu, Seoul,
Korea, Republic of, , Kun Soo Park
We consider the organizational structure of a multinational firm (MNF) that
distributes its product to low-price and high-price markets. MNF competes with
the gray marketer with parallel import. We analyze the impact of information
asymmetry and consumers’ valuation difference in the choice of organizational
structure.
4 - Does Transshipment Benefit Newsvendors under Limited Supply?
Ziteng Wang, Department of Industrial and Systems Engineering,
North Carolina State University, 111 Lampe Dr., Daniels 443,
Raleigh, NC, 27695, United States of America,
, Shu-cherng Fang
In a supply chain consisting of one supplier and two newsvendor-type retailers,
inventory transshipment after demand realization can benefit both newsvendors.
When the supply capacity is limited, however, we find that one of the
newsvendors may be hurt. Insights are discussed and a coordinating mechanism
is designed.
WC78
78-Room 301, CC
Auctions/Mechanism Design
Contributed Session
Chair: Su Xiu Xu, The University of Hong Kong, LG108, Composite
Building, HKU, Hong Kong, 999077, Hong Kong - PRC,
1 - Pro-competitive Rationing in Multi-unit Auctions
Par Holmberg, Associate Professor, Research Institute of Industrial
Organization, Box 55665, Stockholm, SE10215, Sweden,
In multi-unit auctions, rationing rules break ties between multiple marginal bids.
The standard approach is to ration marginal bids proportionally. This paper shows
how bidding can be made more competitive if the rationing rule depends on the
clearing price and gives increasing priority to bidders with a small volume of
marginal bids at clearing prices closer to the reservation price. This can have
almost the same effect on the competitiveness of bids as a doubling of the number
of bidders.
2 - Modeling Electricity Coalition Payoff Disaggregation:
A Multi-Agent Framework
Abbas Ehsanfar, Stevens Institute of Technology, Babbio 516,
6th & River St., Stevens Institute of Tech., Hoboken, NJ, 07030,
United States of America, Babak Heydari
We formulate the electricity consumer and producer coalition in the electricity
market. The cooperation is formulated according to the functionality of electricity
day-ahead and real-time wholesale markets and a mathematical model is
proposed to disaggregate the cooperative payoff among consumers. A multi-agent
approach is applied to create a competitive realistic environment for participants.
3 - An Empirical Study on Recyclers’ Valuation of Plastic Bottle
Recycling in Auctions in Japan
Kazuaki Okubo, Saitama University, 255 Shimo-Okubo,
Sakura-ku, Saitama, Japan,
In Japan, electronic bidding is conducted on contracts for recycling polyethylene
terephthalate bottles in municipality-based auctions. Recyclers and municipalities
are spatially distributed and recyclers can bid in certain municipalities. Predicted
bottle amounts at auctions often differ from post-contract amounts. We use a
structural model and data from these auctions to empirically examine the impact
of recyclers’ distance from municipalities, and of amount differences, on their
valuations.
4 - Social Welfare in Repeated Task Allocation in Transportation
Qing Chuan Ye, Erasmus University Rotterdam, Burg. Oudlaan
50, Rotterdam, Netherlands, Yingqian Zhang
We investigate the social welfare and behaviour of agents in repeated task
allocation problems in transportation by looking at social welfare throughout the
system, and the role behaviour plays in the system and agents’ willingness to
participate. We make use of two task allocation mechanisms, one only
considering optimality in terms of costs and the other considering optimality in
terms of primarily fairness and secondarily costs. Fairness incentivizes agents to
keep participating.
5 - Intermodal Transportation Auctions for B2b E-commerce
Logistics with Transaction Costs
Su Xiu Xu, The University of Hong Kong, LG108, Composite
Building, Hong Kong, 999077, Hong Kong - PRC,
, Meng Cheng, George Q. Huang
We propose efficient intermodal transportation auctions for the B2B e-commerce
logistics problem (ELP). This paper is the first to consider transaction costs into
auctions. The shipper (a B2B e-commerce platform) bears transaction costs while
goods sellers or buyers pay 3PLs’ intermodal services. Total logistics chain cost is
minimized. Incorporating transaction costs leads to considerable cost saving for
the shipper and logistics chain, as well as higher profitability for the group of
3PLs.
WC79
79-Room 302, CC
Software Demonstrations
Invited Session
Introduction to Risk and Decision Analysis using Palisade @RISK
and The Decision Tools Suite, Jose Raul Castro, author
This event is designed to provide an entry-level introduction into probabilistic
analysis and will show how Monte Carlo simulation, decision trees, and opti-
mization can be applied to your everyday business analyses. If you build models
in Excel then Palisade solutions can almost certainly help you to make more
informed decisions, right from your desktop. The webinar will explore some of
the ways in which organizations are applying Palisade tools. From oil and gas,
insurance and finance to healthcare, defense and construction, the DecisionTools
Suite improves decision making at many of the world’s most successful compa-
nies.
Wednesday, 2:45pm - 4:15pm
WD01
01-Room 301, Marriott
Operations Research in Military Medicine and
Healthcare
Sponsor: Military Applications
Sponsored Session
Chair: Nathaniel Bastian, Pennsylvania State Univeristy, 362 Leonhard
Building, University Park, PA, 16823, United States of America,
1 - Medical Evacuation from The Battlefield under Uncertainty
Miguel Lejeune, Associate Professor, The George Washington
University, 2201 G Street, NW, Funger Hall, Suite 415,
Washington, DC, 20052, United States of America,
, Francois Margot
We propose stochastic optimization models that maximize the number of CAT A
high-priority casualties transported to a medical center within one hour.
Uncertainty stems from the difficulty to reach the casualty locations and the load
of the air ambulances. We derive MINLP reformulations and propose algorithmic
methods.
2 - Evaluating The Impact of Hospital Efficiency on Wellness in The
Military Health System
Eric Swenson, Pennsylvania State University, University Park, PA,
United States of Americaer, , Nathaniel Bastian,
Hyojung Kang, Lawrence Fulton, Paul Griffin
Like all healthcare delivery systems, the U.S. military health system strives to
achieve top preventative care and population health outcomes for its members
while operating at an efficient performance level. This work uses DEA, SFA, and
panel regression to investigate the relationship between hospital efficiency and
wellness over time within the military health system. Comparisons are made
using 128 military hospitals and clinics in the Army, Navy and Air Force from
2011 - 2013.
WD01