Hii!
I am trying to run ppml panel structured gravity model, and the usual stata code to run the same is : ppml_panel_sg trade ln_dist colony language contiguity rta, ex(iso_o) im(iso_d) y(year) nopair
It includes describing your exporter, importer, and Year. However my data frame contains four dimensions which includes unique Product Codes too. How can I include product codes in the model. And if not ppml panel sg then is there any other counterpart model which could be suitable for my dataframe?
I am trying to run ppml panel structured gravity model, and the usual stata code to run the same is : ppml_panel_sg trade ln_dist colony language contiguity rta, ex(iso_o) im(iso_d) y(year) nopair
It includes describing your exporter, importer, and Year. However my data frame contains four dimensions which includes unique Product Codes too. How can I include product codes in the model. And if not ppml panel sg then is there any other counterpart model which could be suitable for my dataframe?
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