Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Put switches on the use of bias factors in estimation for diary data and proxy data #313

Open
mabcal opened this issue Dec 29, 2021 · 0 comments

Comments

@mabcal
Copy link
Contributor

mabcal commented Dec 29, 2021

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.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant