Wolfgang Jank

University of Maryland - Decision and Information Technologies Department

Robert H. Smith School of Business

4300 Van Munching Hall

College Park, MD 20742

United States

http://www.smith.umd.edu/faculty/wjank/

  • University of Maryland - Decision and Information Technologies Department

    • Email
    • Tel: 301-405-1118
SCHOLARLY PAPERS

25

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5,347

SSRN CITATIONS
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Top 21,339

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15

CROSSREF CITATIONS

40

Scholarly Papers (25)

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1.

The Long Tail is Longer than You Think: The Surprisingly Large Extent of Online Sales by Small Volume Sellers

Number of pages: 8 Posted: 13 May 2008
Joseph Bailey, Gordon Gao, Wolfgang Jank, Mingfeng Lin, Henry C. Lucas and Siva Viswanathan
University of Maryland, affiliation not provided to SSRN, University of Maryland - Decision and Information Technologies Department, Scheller College of Business, Georgia Institute of Technology, University of Maryland - Robert H. Smith School of Business and University of Maryland - Robert H. Smith School of Business
Downloads 958 (42,166)
Citation 7

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Internet Retailing, Long Tail, Electronic Commerce

2.

Consumer Surplus in Online Auctions

Downloads 551 (87,091)
Citation 16

Consumer Surplus in Online Auctions

Number of pages: 48 Posted: 10 Nov 2005
Ravi Bapna, Wolfgang Jank and Galit Shmueli
Indian School of Business, University of Maryland - Decision and Information Technologies Department and Institute of Service Science, National Tsing Hua University, Taiwan
Downloads 403 (125,519)
Citation 22

Abstract:

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eBay, sniping, highest bid, Weibull distribution

Consumer Surplus in Online Auctions

Information Systems Research, Forthcoming
Number of pages: 31 Posted: 30 Jan 2008 Last Revised: 24 Feb 2015
Ravi Bapna, Wolfgang Jank and Galit Shmueli
Indian School of Business, University of Maryland - Decision and Information Technologies Department and Institute of Service Science, National Tsing Hua University, Taiwan
Downloads 148 (336,625)

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eBay, sniping, highest bid, consumer surplus

3.

The Value of Online Trust Seals: Evidence from Online Retailing

Number of pages: 32 Posted: 20 Apr 2010
Koray Özpolat, Guodong (Gordon) Gao, Wolfgang Jank and Siva Viswanathan
University of Rhode Island - College of Business Administration, Johns Hopkins University - Carey Business School, University of Maryland - Decision and Information Technologies Department and University of Maryland - Robert H. Smith School of Business
Downloads 381 (134,997)

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Electronic commerce, Online Certification, Online Trust Seals, Information Asymmetry

4.

Estimating Flight Departure Delay Distributions - a Statistical Approach with Long-Term Trend and Short-Term Pattern

Robert H. Smith School Research Paper No. RHS 06-034
Number of pages: 29 Posted: 11 Aug 2006
Yufeng Tu, Michael O. Ball and Wolfgang Jank
University of Maryland - Decision and Information Technologies Department, University of Maryland - Decision and Information Technologies Department and University of Maryland - Decision and Information Technologies Department
Downloads 350 (148,206)
Citation 6

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Smoothing spline, mixture model, Expectation Maximization (EM), Genetic Algorithm (GA), airline delay, airspace congestion, delay distribution

5.

Profiling Price Dynamics in Online Auctions Using Curve Clustering

Robert H. Smith School Research Paper No. RHS-06-004
Number of pages: 29 Posted: 18 May 2006
Wolfgang Jank and Galit Shmueli
University of Maryland - Decision and Information Technologies Department and Institute of Service Science, National Tsing Hua University, Taiwan
Downloads 279 (188,124)
Citation 15

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functional data analysis, clustering, differential equations, electronic commerce, online auction, eBay, price dynamics, auction types

6.

Measuring Consumer Surplus on eBay: An Empirical Study

Robert H. Smith School Research Paper No. RHS-06-053
Number of pages: 20 Posted: 01 Jun 2007 Last Revised: 25 Jul 2011
Ravi Bapna, Wolfgang Jank and Galit Shmueli
Indian School of Business, University of Maryland - Decision and Information Technologies Department and Institute of Service Science, National Tsing Hua University, Taiwan
Downloads 256 (205,152)

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Online auctions, consumer surplus, eBay, sniping

7.

The Wisdom of Crowds: Pre-Release Forecasting via Functional Shape Analysis Of the Online Virtual Stock Market

Number of pages: 42 Posted: 12 Jul 2009
Natasha Zhang Foutz and Wolfgang Jank
University of Virginia and University of Maryland - Decision and Information Technologies Department
Downloads 251 (209,133)
Citation 8

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Forecasting, Innovation, Marketing Research, Entertainment Marketing, Motion Picture, Online Virtual Stock Market, Prediction Market, Trading Dynamics, Nonparametric Statistical Method, Functional Shape Analysis, Functional Data Analysis, Smoothing, Functional Principal Component Analysis

8.

Influencing Elections with Statistics: Targeting Voters with Logistic Regression Trees

Number of pages: 27 Posted: 06 Mar 2012
Thomas Rusch, Ilro Lee, Kurt Hornik, Wolfgang Jank and Achim Zeileis
Vienna University of Economics and Business, UNSW Business School, Vienna University of Economics and Business, University of Maryland - Decision and Information Technologies Department and University of Innsbruck
Downloads 246 (213,369)
Citation 3

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9.

Price Formation and its Dynamics in Online Auctions

Robert H. Smith School Research Paper No. RHS-06-003
Number of pages: 35 Posted: 18 May 2006
Ravi Bapna, Wolfgang Jank and Galit Shmueli
Indian School of Business, University of Maryland - Decision and Information Technologies Department and Institute of Service Science, National Tsing Hua University, Taiwan
Downloads 242 (216,727)
Citation 20

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Functional regression analysis, data smoothing, eBay, online auction, auction dynamics, electronic commerce

10.

Modeling Price Dynamics in eBay Auctions Using Principal Differential Analysis

Robert H. Smith School Research Paper No. RHS-06-052
Number of pages: 36 Posted: 01 Jun 2007
Wolfgang Jank, Galit Shmueli, Shanshan Wang and Paul Smith
University of Maryland - Decision and Information Technologies Department, Institute of Service Science, National Tsing Hua University, Taiwan, University of Maryland - College of Computer, Mathematical and Natural Sciences and University of Maryland - College of Computer, Mathematical and Natural Sciences
Downloads 241 (217,545)
Citation 1

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Auction dynamics, functional data analysis, differential equation, price curve, multiple comparisons

11.

Modeling Bid Arrivals in Online Auctions

Robert H. Smith School Research Paper No. RHS-06-001
Number of pages: 34 Posted: 17 May 2006
Galit Shmueli, Ralph P. Russo and Wolfgang Jank
Institute of Service Science, National Tsing Hua University, Taiwan, University of Iowa - Department of Statistics & Actuarial Science and University of Maryland - Decision and Information Technologies Department
Downloads 192 (269,000)
Citation 7

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Non-homogenous Poisson process,online auction,bid data, self-similarity, bidding dynamics

12.

The Right Auction at the Right Price

Robert H. Smith School Research Paper No. RHS-06-009
Number of pages: 8 Posted: 26 May 2006
Matthew Reindorp, Wolfgang Jank and Louiqa Raschid
Drexel University - Department of Decision Sciences, University of Maryland - Decision and Information Technologies Department and University of Maryland - Decision and Information Technologies Department
Downloads 174 (293,295)
Citation 1

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online auctions, statistical models, price prediction, strategic bidding

13.

An Automated and Data-Driven Bidding Strategy for Online Auctions

Number of pages: 37 Posted: 30 Jun 2009
Wolfgang Jank and Shu Zhang
University of Maryland - Decision and Information Technologies Department and affiliation not provided to SSRN
Downloads 139 (353,207)
Citation 5

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functional data, dynamics, online auction, bidding, forecasting, competition, eBay, electronic commerce, consumer surplus

14.

Real-Time Forecasting of Online Auctions via Functional K-Nearest Neighbors

Number of pages: 32 Posted: 12 Jul 2009
Shu Zhang, Wolfgang Jank and Galit Shmueli
University of Maryland - College Park, University of Maryland - Decision and Information Technologies Department and Institute of Service Science, National Tsing Hua University, Taiwan
Downloads 130 (371,755)
Citation 4

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eBay, functional forecasting, functional data, Kullback-Leibler distance, Beta distribution, dynamics

15.

Real-Time Diffusion of Information on Twitter and the Financial Markets

Tafti A, Zotti R, Jank W (2016) Real-Time Diffusion of Information on Twitter and the Financial Markets. PLoS ONE 11(8): e0159226, DOI: 10.1371/journal.pone.0159226
Number of pages: 29 Posted: 20 Dec 2015 Last Revised: 21 Sep 2016
Ali R. Tafti, Ryan Zotti and Wolfgang Jank
University of Illinois at Chicago, Capital One Financial Corporation and University of Maryland - Decision and Information Technologies Department
Downloads 125 (383,016)
Citation 2

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16.

E-Loyalty Networks in Online Auctions

Robert H. Smith School Research Paper No. RHS 06-101
Number of pages: 32 Posted: 18 Jul 2009 Last Revised: 16 Sep 2009
Wolfgang Jank and Inbal Yahav
University of Maryland - Decision and Information Technologies Department and Tel Aviv University - Coller School of Management
Downloads 118 (399,640)

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Online auction, electronic commerce, functional data, principal component analysis, model assumptions, random effects model, weighted least squares, clustering

17.

Estimating Functional Agent-Based Models: An Application to Bid Shading in Online Markets Format

GECCO 2011, Dublin, Ireland, July 12-16, 2011, Robert H. Smith School Research Paper No. RHS 06-134
Number of pages: 9 Posted: 21 May 2011
Wei Guo, Wolfgang Jank and William Rand
University of Maryland - College of Computer, Mathematical and Natural Sciences, University of Maryland - Decision and Information Technologies Department and North Carolina State University
Downloads 112 (415,134)

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internet auctions, agent-based modeling, calibration, business, simulation, genetic algorithms

18.

Second-Generation Prediction Markets for Information Aggregation: A Comparison of Payoff Mechanisms

Number of pages: 33 Posted: 20 Jul 2009
Christian Slamka, Wolfgang Jank and Bernd Skiera
Goethe University Frankfurt, University of Maryland - Decision and Information Technologies Department and Goethe University Frankfurt
Downloads 104 (437,815)
Citation 1

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prediction markets, preference markets, idea markets, forecasting, decision making, new product development

19.

Modeling Concurrency of Events in Online Auctions Via Spatio-Temporal Semiparametric Models

Robert H. Smith School Research Paper No. RHS 06-030
Number of pages: 42 Posted: 24 Jul 2006
Wolfgang Jank and Galit Shmueli
University of Maryland - Decision and Information Technologies Department and Institute of Service Science, National Tsing Hua University, Taiwan
Downloads 103 (440,832)
Citation 5

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Nonparametric model, distance measure, dissimilarity, spatial model, timelag, mixed model, online auction, E-Bay

20.

Transformations for Semi-Continuous Data

Robert H. Smith School Research Paper No. RHS 06-051
Number of pages: 32 Posted: 15 Jan 2007
Galit Shmueli, Wolfgang Jank and Valerie Hyde
Institute of Service Science, National Tsing Hua University, Taiwan, University of Maryland - Decision and Information Technologies Department and University of Maryland
Downloads 92 (475,124)

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data tranformation, too-frequent values, jittering, local-regeneration, max-bin histogram, online auction, eBay

21.

Ascent EM for Efficient Curve-Clustering in Large Online Auction Databases

Robert H. Smith School Research Paper No. RHS-06-008
Number of pages: 25 Posted: 18 May 2006
Wolfgang Jank
University of Maryland - Decision and Information Technologies Department
Downloads 91 (478,471)
Citation 1

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stochastic optimization, monte carlo, em algorithm, clustering, functional data, electronic commerce, online auction, eBay

22.

New Global Optimization Algorithms for Model-Based Clustering

Number of pages: 37 Posted: 18 Jul 2009
Jeffrey Heath, Michael Fu and Wolfgang Jank
Centre College, University of Maryland - College Park and University of Maryland - Decision and Information Technologies Department
Downloads 63 (589,383)

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EM algorihm, global optimum, mixture model

23.

Switching Behavior in Online Auctions: Empirical Observations and Predictive Implications

Proceedings of the 2013 Winter Simulation Conference, R. Pasupathy, S.-H. Kim, A. Tolk, R. Hill, and M. E. Kuhl, eds., 2013, Robert H. Smith School Research Paper
Number of pages: 12 Posted: 16 Aug 2013 Last Revised: 22 Jun 2014
Wei Guo, William Rand and Wolfgang Jank
University of Maryland - College of Computer, Mathematical and Natural Sciences, North Carolina State University and University of Maryland - Decision and Information Technologies Department
Downloads 58 (614,094)

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agent-based modeling, auctions, switching, empirical, simultaneous auctions, bidding, behavior

24.

SOABER: An Innovative Approach to Maximize Bidder Surplus in Simultaneous Online Art Auctions

Number of pages: 37 Posted: 26 Nov 2010
Mayukh Dass, Wolfgang Jank and Galit Shmueli
Texas Tech University - Area of Marketing, University of Maryland - Decision and Information Technologies Department and Institute of Service Science, National Tsing Hua University, Taiwan
Downloads 54 (634,997)

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25.

Competition Between Auctions

Marketing Letters, Vol. 19, Nos. 3-4, pp. 431-448, 2008
Number of pages: 18 Posted: 14 Apr 2009 Last Revised: 19 Nov 2017
Ernan Haruvy, Peter T. L. Popkowski Leszczyc, Octavian Carare, James C. Cox, Eric Greenleaf, Wolfgang Jank, Sandy D. Jap, Young-Hoon Park and Michael H. Rothkopf
McGill University, University of Queensland - Business School, Consumer Financial Protection Bureau, Georgia State University - Department of Economics, New York University (NYU) - Department of Marketing, University of Maryland - Decision and Information Technologies Department, Emory University - Department of Marketing, Cornell University - Samuel Curtis Johnson Graduate School of Management and Rutgers University, Piscataway
Downloads 37 (740,569)
Citation 4

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auctions, bidding, competition, auction formats, auction houses