Huff model Calibration mathematical model

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I would like to ask about the Huff model parameter tips (Huff model calibration). Since the official website does not explain the mathematical formula in detail, I would like to ask here.



best wishes

DanPatterson

There is some info here

How Huff Model works—ArcGIS Pro | Documentation

then you have to go to other sources

Calibrating the dynamic Huff model for business analysis using location big data (wisc.edu)

for example