Tractors in Spain: a Further Logistic Analysis

Tractors in Spain: a Further Logistic Analysis

The three parameter logistic growth function is known to give a good fit to annual statistics of the number of tractors in Spain. A parameterisation directly yielding the upper asymptote or saturation level is advanced, and the variance-covariance matrix of the parameter estimates is computed. A gen...

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Veröffentlicht in:The Journal of the Operational Research Society 1981-06, Vol.32 (6), p.499-502
1. Verfasser: Oliver, F. R.
Format: Artikel
Sprache:eng
Schlagworte:
Analysis
Asymptotes
Business and Management
Estimating techniques
Functions
Growth
Innovation diffusion
Least squares
Level
Logistic analysis
Logistic growth
Logistics
Management
Mathematical functions
Mathematical independent variables
Operations research
Operations Research/Decision Theory
Saturation
Standard error
Statistical analysis
Technical Note
Technical Notes
Time series
Tractors
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Beschreibung
Zusammenfassung:The three parameter logistic growth function is known to give a good fit to annual statistics of the number of tractors in Spain. A parameterisation directly yielding the upper asymptote or saturation level is advanced, and the variance-covariance matrix of the parameter estimates is computed. A generalisation of the logistic, which proved useful in studying the growth of the number of tractors in Great Britain is examined and gives appreciably different results.
ISSN:0160-5682
1476-9360
DOI:10.1057/jors.1981.101