Formulas for gross domestic product and trade balance do not apply to small, emergent economies in the same way they apply to established economies, because they are developing and are not in equilibrium.

Formulas for gross domestic product and trade balance do not apply to small, emergent economies in the same way they apply to established economies, because they are developing and are not in equilibrium
Here they would refer to established economies...... INCORRECT

Because they are developing and are not in equilibrium, formulas for gross domestic product and trade balance do not apply to small, emergent economies in the same way they apply to established economies
It means formulas are developing...... INCORRECT

Because they are developing and are not in equilibrium, small, emergent economies are not subject to the same applicability of formulas for gross domestic product and trade balance as established economies
Wordy. We have a better option...... INCORRECT

Because small, emergent economies are developing and are not in equilibrium, formulas for gross domestic product and trade balance do not apply to them in the same way they apply to established economies
Clear...... CORRECT

Small, emergent economies are not subject to the applicability of formulas for gross domestic product and trade balance in the same way as established economies, because they are developing and are not in equilibrium
Wordy + pronoun ambiguity...... INCORRECT