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
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