STATISTICAL NOTES ON THE EVALUATION OF CALIBRATED GRAVITY MODELS

This paper discusses theoretically the statistical tests and measures that are commonly used to evaluate the accuracy of the calibration of gravity models. It is shown that an inappropriate treatment of trip matrices as a certain type of contingency table has yielded erroneous interpretations. Also one of the most commonly used techniques in this context, the correlation coefficient, is inappropriate. Finally a further method of analysis involving the likelihood is proposed.(a) /TRRL/

• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Wilson, S R
• Publication Date: 1976-10

Language

• English

Media Info

• Features: References;
• Pagination: p. 343-345
• Serial:
  • Transportation Research /UK/
  • Volume: 10
  • Issue Number: 5
  • Publisher: Pergamon Press, Incorporated

Subject/Index Terms

• TRT Terms: Calibration; Correlation analysis; Errors; Evaluation; Gravity models; Mathematical models; Statistics
• ITRD Terms: 6171: Calibration; 6440: Error; 690: Gravity model; 6473: Mathematical model; 6555: Statistics
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I71: Traffic Theory;

Filing Info

• Accession Number: 00149079
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Jul 2 1977 12:00AM