I'm trying to build a gravity model for international trade. The regression equation goes as follows:
Ln[Trade_(ijt)] = a + b*ln[gdp_(it)] + c*ln[gdp_(jt)] + d*ln[distance_(ij)] +e_(ijt)
where,
i = country A,
j = country B,C... & Z, (8 countries)
t = time (from 2001 to 2017)
So how do I fit this model in JMP? I only know OLS and someone told me this should be done with a mixed model.