Fred Collopy

Case Western Reserve University - Department of Information Systems

10900 Euclid Ave.

Cleveland, OH 44106-7235

United States

  • Case Western Reserve University - Department of Information Systems

SCHOLARLY PAPERS

15

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SSRN CITATIONS
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Top 9,672

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11

CROSSREF CITATIONS

135

Scholarly Papers (15)

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1.

Integration of Statistical Methods and Judgment for Time Series Forecasting: Principles from Empirical Research

FORECASTING WITH JUDGMENT, G. Wright and P. Goodwin, eds., John Wiley & Sons Ltd., 269-293, 1998
Number of pages: 33 Posted: 22 Jul 2008
J. Scott Armstrong and Fred Collopy
University of Pennsylvania - Marketing Department and Case Western Reserve University - Department of Information Systems
Downloads 489 (93,825)

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Forecasting, time series forecasting, integration

2.

Error Measures for Generalizing About Forecasting Methods: Empirical Comparisons

International Journal of Forecasting, Vol. 8, pp. 69-80, 1992
Number of pages: 18 Posted: 07 Feb 2005 Last Revised: 01 Jan 2012
J. Scott Armstrong and Fred Collopy
University of Pennsylvania - Marketing Department and Case Western Reserve University - Department of Information Systems
Downloads 294 (166,164)
Citation 2

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Forecast accuracy, M-Competition, Relative absolute error, Theil's U

3.

Answers to Frequently Asked Questions (FAQ) in Forecasting

Number of pages: 12 Posted: 14 Jul 2008
J. Scott Armstrong, Fred Collopy and Kesten C. Green
University of Pennsylvania - Marketing Department, Case Western Reserve University - Department of Information Systems and University of South Australia - UniSA Business
Downloads 159 (295,679)

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4.

Competitor Orientation: Effects of Objectives and Information on Managerial Decisions and Profitability

Journal of Marketing Research, Vol. 33, pp. 188-199, May 1996
Number of pages: 22 Posted: 05 Apr 2005 Last Revised: 30 Dec 2011
J. Scott Armstrong and Fred Collopy
University of Pennsylvania - Marketing Department and Case Western Reserve University - Department of Information Systems
Downloads 138 (331,637)
Citation 2

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competitor, management, profitability

5.

Rule-Based Forecasting: Development and Validation of an Expert Systems Approach to Combining Time Series Extrapolations

Management Science, Vol. 38, No. 10, pp. 1394-1414, 1992
Number of pages: 25 Posted: 08 Feb 2005 Last Revised: 01 Jan 2012
Fred Collopy and J. Scott Armstrong
Case Western Reserve University - Department of Information Systems and University of Pennsylvania - Marketing Department
Downloads 98 (425,123)

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Rule-based forecasting, forecasting, time series, research

6.

Automatic Identification of Time Series Features for Rule-Based Forecasting

International Journal of Forecasting, Vol. 17, 143-157, 2001
Number of pages: 13 Posted: 07 Feb 2005 Last Revised: 01 Jan 2012
Monica Adya, Fred Collopy, J. Scott Armstrong and Miles Kennedy
Marquette University - College of Business Administration, Case Western Reserve University - Department of Information Systems, University of Pennsylvania - Marketing Department and Independent Author
Downloads 94 (436,660)

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Rule-based forecasting, time series, forecasting, heuristic forecasting

7.

The Profitability of Winning

Downloads 84 (468,281)

The Profitability of Winning

Number of pages: 3 Posted: 19 Aug 2008
Fred Collopy and J. Scott Armstrong
Case Western Reserve University - Department of Information Systems and University of Pennsylvania - Marketing Department
Downloads 84 (472,841)

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The Profitability of Winning

Chief Executive, pp. 61-63, June 1994
Posted: 11 Feb 2005 Last Revised: 31 Dec 2011
J. Scott Armstrong and Fred Collopy
University of Pennsylvania - Marketing Department and Case Western Reserve University - Department of Information Systems

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Management, profitability, profits, competitive objective

8.

How Serious are Methodological Issues in Surveys? A Reexamination of the Clarence Thomas Polls

Number of pages: 7 Posted: 07 Feb 2005 Last Revised: 04 Apr 2012
J. Scott Armstrong and Fred Collopy
University of Pennsylvania - Marketing Department and Case Western Reserve University - Department of Information Systems
Downloads 69 (523,580)

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forecasting, surveys, Clarence Thomas Polls, opinion polling

9.

Causal Forces: Structuring Knowledge for Time-Series Extrapolation

Journal of Forecasting , Vol. 12, pp. 103-115, 1993
Number of pages: 17 Posted: 07 Feb 2005 Last Revised: 01 Jan 2012
J. Scott Armstrong and Fred Collopy
University of Pennsylvania - Marketing Department and Case Western Reserve University - Department of Information Systems
Downloads 61 (557,789)
Citation 1

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Causal forces, Combining, Contrary trends, Damped trends, Exponential

10.

An Application of Rule-Based Forecasting to a Situation Lacking Domain Knowledge

International Journal of Forecasting, Vol. 16, pp. 477-484, 2000
Number of pages: 6 Posted: 07 Feb 2005 Last Revised: 31 Dec 2011
Monica Adya, J. Scott Armstrong, Fred Collopy and Miles Kennedy
Marquette University - College of Business Administration, University of Pennsylvania - Marketing Department, Case Western Reserve University - Department of Information Systems and Independent Author
Downloads 53 (595,722)

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Forecast, rule-based forecasting, RBF

11.

Expert Opinions About Extrapolation and the Mystery of the Overlooked Discontinuities

International Journal of Forecasting, Vol. 8, pp. 575-582, 1992
Number of pages: 10 Posted: 08 Feb 2005 Last Revised: 22 Jul 2008
Fred Collopy and J. Scott Armstrong
Case Western Reserve University - Department of Information Systems and University of Pennsylvania - Marketing Department
Downloads 50 (611,442)

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Discontinuities, Forecasting guidelines, Selection criteria, Time series features

12.

Principles for Examining Predictive Validity: The Case of Information Systems Spending Forecasts

Information Systems Research, Vol. 5, pp. 170-179, June 1994
Number of pages: 10 Posted: 21 Jul 2008
J. Scott Armstrong, Fred Collopy and Monica Adya
University of Pennsylvania - Marketing Department, Case Western Reserve University - Department of Information Systems and Marquette University - College of Business Administration
Downloads 46 (632,843)
Citation 1

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13.

Toward Computer-Aided Forecasting Systems: Gathering, Coding, and Validating the Knowledge

DSS-89 TRANSACTIONS: NINTH INTERNATIONAL CONFERENCE ON DECISION SUPPORT SYSTEMS, George R. Widmeyer, ed., Institute of Management Sciences, pp. 103-119, 1989
Number of pages: 17 Posted: 21 Jul 2008
Fred Collopy and J. Scott Armstrong
Case Western Reserve University - Department of Information Systems and University of Pennsylvania - Marketing Department
Downloads 41 (661,706)

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14.

Identification of Asymmetric Prediction Intervals Through Causal Forces

Journal of Forecasting, Vol. 20, No. 4, pp. 273-283, July 2001
Number of pages: 10 Posted: 07 Feb 2005 Last Revised: 22 Jul 2008
J. Scott Armstrong and Fred Collopy
University of Pennsylvania - Marketing Department and Case Western Reserve University - Department of Information Systems
Downloads 34 (706,339)

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Forecasting, asymmetric prediction, causal forces, series forecast

15.

Decomposition by Causal Forces: A Procedure for Forecasting Complex Time Series

International Journal of Forecasting, Forthcoming
Posted: 07 Feb 2005 Last Revised: 01 Jan 2012
J. Scott Armstrong, Fred Collopy and Thomas Yokum
University of Pennsylvania - Marketing Department, Case Western Reserve University - Department of Information Systems and Angelo State University - College of Business and Professional Studies

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Airline accidents, extrapolation, Holt's exponential smoothing, model formulation, personal computers