How do you solve the gravity model equation?

Answer 1

To solve the gravity model equation, which typically relates the interaction between two entities (like trade between countries) to their sizes (often represented by GDP) and the distance between them, you start by specifying the formula: ( F = \frac{G \cdot (M_1 \cdot M_2)}{D^2} ), where ( F ) is the force of interaction, ( G ) is a gravitational constant, ( M_1 ) and ( M_2 ) are the masses of the entities, and ( D ) is the distance. You can rearrange the equation to solve for any variable of interest, such as the interaction force, by substituting the known values for the masses and the distance. Finally, calculate using the appropriate mathematical operations to find the solution.