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Recalibration of constants

Ask questions about post-estimation functions (e.g. prediction, conditionals, etc) or other processing of results.
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svenne
Posts: 23
Joined: 26 Apr 2020, 16:20
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Recalibration of constants

Post by svenne » 05 Feb 2021, 16:17

Dear all,

does anyone know a convenient way to recalibrate ASCs according outside market shares (see Train, p 33)? I see no way to manipulate the $estimate in an apollo_estimate() object.

Best
Sven

stephanehess
Site Admin
Posts: 558
Joined: 24 Apr 2020, 16:29

Re: Recalibration of constants

Post by stephanehess » 05 Feb 2021, 17:43

Hi Sven

you can easily change model$estimate.

E.g. use

model$estimate["asc_1"]=model$estimate["asc_1"]+log(real_demand/model_demand)

Stephane
--------------------------------
Stephane Hess
www.stephanehess.me.uk

svenne
Posts: 23
Joined: 26 Apr 2020, 16:20
Contact:

Re: Recalibration of constants

Post by svenne » 05 Feb 2021, 17:54

Pretty cool. Thank you so much.
Best
Sven

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