Arrange the following steps in calibrating a Gravity Model to actual data:
- Measure the distances between each pair of locations
- Determine the masses of origins and destinations
- Validate the model by comparing predicted interactions to actual data
- Collect empirical data on existing interactions between locations
- Calculate the gravity constant using regression analysis
1
4, 2, 1, 5, 3
2
2, 1, 3, 4, 5
3
2, 3, 1, 4, 5
4
1, 3, 2, 4, 5