DaySim icon indicating copy to clipboard operation
DaySim copied to clipboard

Put switches on the use of bias factors in estimation for diary data and proxy data

Open mabcal opened this issue 4 years ago • 0 comments

There are two new switches

UseDiaryVsSmartphoneBiasVariables UseProxyBiasVariables

These are False by default.

When they are True and the Diary and Proxy fields are set on the person file, they are used to estimate bias factors - mainly in the IndividualPersonDayPattern and IntermediateStopGeneration models that determine tour rates.

If UseDiaryVsSmartphoneBiasVariables is true and pDiary>0 on the person file, it will use a bias dummy variable in the models. For SACOG, this has been used to capture the (negative) bias in trips and tours for diary-based data versus smartphone-based survey data, but could be used other ways.

If UseProxyBiasVariables is true and pProxy>0 on the person file, it will use a proxy bias dummy variable in the models. For SACOG, this has been used to capture any bias in tours for use of proxy in diary-based survey data.

In general, these should be set to true only in estimation mode and to false in application mode, although if the pDiary and pProxy variables are always set to -1 or 0 in synthetic population files, they will not matter in application mode anyway.

mabcal avatar Dec 29 '21 18:12 mabcal