Dear Statalists,

Could you please tell me the reason why when I type the following command:

medeff (regress edb51 acled gdpgrowth1 gdppercapita1 trade1 inflation1 exchangerate1 telephone1 cellphone1 education1 i.cid i.year) (regress fdiwdi1 acled edb51 gdpgrowth1 gdppercapita1 trade1 inflation1 exchangerate1 telephone1 cellphone1 education1 i.cid i.year), treat(acled), mediate(edb51) sims (1000) vce (bootstrap)

Stata gives me the error r.198 with the saying invalid 'mediate'.

Please I hope someone can help because it is really urgent!!!

Thank you very much and kind regards,
Siham Hari