Computing elasticities of the EASI demand model

[Fatou Faye]

Hello,
I estimated the EASI model on consumption data using STATA codes from Pendakur's paper (Easi mader easier, 2008). I have regression results. However, the code in the paper did not tell how to compute elasticies of prices and income after estimation. Could you please tell me how to obtain them?
Thanks

[ardy rebouka]

Hello,
I am currently trying to estimate an EASI model using the code from Pendakur's article (EASI Made Easier, 2008) with data from the EHCVM surveys. I am encountering the following error message: 'there are at least as many constraints as parameters r(498)'; could I please have some help?