An estimation method of the average effect and the different accident risks when modelling a road safety measure: A simulation study
The combination of road accident frequencies before and after a similar change at a given number of sites are considered. Each target site includes different accident types and is linked to a specific control area. At any one target site it is assumed that the total number of accidents recorded is m...
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| Veröffentlicht in: | Computational statistics & data analysis 2006-11, Vol.51 (2), p.1260-1277 |
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| container_title | Computational statistics & data analysis |
| container_volume | 51 |
| creator | N’Guessan, Assi Essai, Azeddine N’Zi, Modeste |
| description | The combination of road accident frequencies before and after a similar change at a given number of sites are considered. Each target site includes different accident types and is linked to a specific control area. At any one target site it is assumed that the total number of accidents recorded is multinomially distributed between the before period and the after period and also between several mutually exclusive types. The parameter of the distribution depends on the different accident risks in the control area linked to each site as well as on the average effect of the change. A method of estimating simultaneously the average effect and the accident risks in control areas is suggested. Some simulated accidents data allow us to study the existence and consistence of the linear constrained estimator of the unknown vector parameter. |
| doi_str_mv | 10.1016/j.csda.2005.09.002 |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 0167-9473 |
| ispartof | Computational statistics & data analysis, 2006-11, Vol.51 (2), p.1260-1277 |
| issn | 0167-9473 1872-7352 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_19471748 |
| source | RePEc; Elsevier ScienceDirect Journals Complete |
| subjects | Accident data Accident risk Before–after estimation Constrained maximum likelihood Distribution theory Exact sciences and technology General topics Mathematics Mean square error Multinomial model Multivariate analysis Numerical analysis Numerical analysis. Scientific computation Numerical methods in probability and statistics Probability and statistics Probability theory and stochastic processes Road safety measure Sciences and techniques of general use Simulation Statistics |
| title | An estimation method of the average effect and the different accident risks when modelling a road safety measure: A simulation study |
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