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作者：Jose, Victor Richmond R.
作者单位：Georgetown University
摘要：Properties of two large families of scale-free forecast accuracy measures that include popular measures such as mean absolute percentage error, relative error, and squared percentage error, are examined in this paper. We describe the optimal reports when forecasts are evaluated using these measures. We also provide analytic expressions for the optimal Bayes' act associated with these measures under a general power transformation for several well-known probability distributions. We then show th...
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作者：Rothvoss, Thomas; Sanita, Laura
作者单位：University of Washington; University of Washington Seattle; University of Waterloo
摘要：For a polytope P, the Chvatal closure P ' subset of P is obtained by simultaneously strengthening all feasible inequalities cx <= beta (with integral c) to cx <= left perpendicular beta right perpendicular. The number of iterations of this procedure that are needed until the integral hull of P is reached is called the Chvatal rank. If P subset of [0,1](n), then it is known that O(n(2) log n) iterations always suffice and at least (1+1/e - o(1))(n) iterations are sometimes needed, leaving a hug...
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作者：Aksin, Zeynep; Ata, Baris; Emadi, Seyed Morteza; Su, Che-Lin
作者单位：Koc University; University of Chicago; University of North Carolina; University of North Carolina Chapel Hill
摘要：We undertake an empirical study of the impact of delay announcements on callers' abandonment behavior and the performance of a call center with two priority classes. A Cox regression analysis reveals that in this call center, callers' abandonment behavior is affected by the announcement messages heard. To account for this, we formulate a structural estimation model of callers' (endogenous) abandonment decisions. In this model, callers are forward-looking utility maximizers and make their aband...
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作者：He, Xue Dong; Hu, Sang; Obloj, Jan; Zhou, Xun Yu
作者单位：Chinese University of Hong Kong; The Chinese University of Hong Kong, Shenzhen; University of Oxford; University of Oxford; Columbia University
摘要：We consider the dynamic casino gambling model initially proposed by Barberis (2012) and study the optimal stopping strategy of a precommitting gambler with cumulative prospect theory (CPT) preferences. We illustrate how the strategies computed in Barberis (2012) [ Barberis N (2012) A model of casino gambling. Management Sci. 58(1): 35-51.] can be strictly improved by reviewing the betting history or by tossing an independent coin, andwe explain that the improvement generated by using randomize...
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作者：Dieker, A. B.; Ghosh, S.; Squillante, M. S.
作者单位：Columbia University; International Business Machines (IBM); IBM USA
摘要：We develop a framework for determining the optimal resource capacity of each station composing a stochastic network, motivated by applications arising in computer capacity planning and business process management. The problem is mathematically intractable in general and therefore one typically resorts to either simplistic analytical approximations or time-consuming simulation-based optimization methods. Our solution framework includes an iterative methodology that relies only on the capability...
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作者：Negahban, Sahand; Oh, Sewoong; Shah, Devavrat
作者单位：Yale University; University of Illinois System; University of Illinois Urbana-Champaign; Massachusetts Institute of Technology (MIT)
摘要：The question of aggregating pairwise comparisons to obtain a global ranking over a collection of objects has been of interest for a very long time: be it ranking of online gamers (e.g., MSR's TrueSkill system) and chess players, aggregating social opinions, or deciding which product to sell based on transactions. In most settings, in addition to obtaining a ranking, finding 'scores' for each object (e.g., player's rating) is of interest for understanding the intensity of the preferences. In th...
