Yes. As a rule, new branches and locations do not emerge on the greenfield, but there are already empirical values from existing locations. Follow these steps to calibrate the gravity model to reality: First, prepare a sales forecast for the new location. Second, prepare a sales forecast for existing branch locations. If you find that the result deviates from reality and for example a branch location has only 16 million euros in sales, while the forecast is for 18 million, then adjust one or the other parameter in the gravity model until the result of the forecast corresponds to the actual sales of the existing branch location. This calibration brings the model closer to reality and makes the location assessment more accurate.