Fred Collopy

Case Western Reserve University - Department of Information Systems

10900 Euclid Ave.

Cleveland, OH 44106-7235

United States

SCHOLARLY PAPERS

15

DOWNLOADS
Rank 43,951

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Top 43,951

in Total Papers Downloads

1,477

SSRN CITATIONS
Rank 8,796

SSRN RANKINGS

Top 8,796

in Total Papers Citations

10

CROSSREF CITATIONS

135

Scholarly Papers (15)

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 430 (93,362)

Abstract:

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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 279 (149,885)
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
University of Pennsylvania - Marketing Department, Case Western Reserve University - Department of Information Systems and University of South Australia - UniSA Business
Downloads 143 (274,135)

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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 125 (303,599)
Citation 2

Abstract:

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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 81 (403,164)

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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
Marquette University - College of Business Administration, Case Western Reserve University - Department of Information Systems, University of Pennsylvania - Marketing Department and Independent Author
Downloads 81 (403,164)

Abstract:

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

7.
Downloads 69 (440,641)

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 69 (446,249)

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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 60 (472,745)

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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 44 (540,271)
Citation 1

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

10.

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 39 (565,030)

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Discontinuities, Forecasting guidelines, Selection criteria, Time series features

11.

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
Marquette University - College of Business Administration, University of Pennsylvania - Marketing Department, Case Western Reserve University - Department of Information Systems and Independent Author
Downloads 39 (565,030)

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Forecast, rule-based forecasting, RBF

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 33 (597,495)
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 32 (603,154)

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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 22 (669,579)

Abstract:

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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

Abstract:

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