Calibrations of detterence functions: Poisson model
3 important questions on Calibrations of detterence functions: Poisson model
What is given in Poisson model?
- Observed OD-matrix from a survey (nog necessarily complete)
- Cost functions
- Discretisation fo the cost function F(cij)-> Fk(cij)
- Cost functions
- Discretisation fo the cost function F(cij)-> Fk(cij)
What are the constaints for Poisson model?
- Each origin i the number of observed trips (departures)
- Each destination j the number of observed trips (arrivals)
- For each 'bin' k the number of observed trips
- Each destination j the number of observed trips (arrivals)
- For each 'bin' k the number of observed trips
From discrete distribution function to continuous function
- Just test which function yields the best fit with the function values (function and parameters)
- In practice it's likely that you have to choose for which range of costs the fit it ibest (one size doesn't fit al)
- In practice it's likely that you have to choose for which range of costs the fit it ibest (one size doesn't fit al)
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