Hey! Can anybody help me with the DID model with one treatment across periods? I'll be really grateful coz I've looked around for quite a long time but no answers.
Say if I would like to evaluate the effects of PolicyA on the GDP , for example. I have 10 cities in the dataset from 1990 to 2000. City 1 was treated in 1992 , city 2 was treated in 1995, city3 was treated in 1996,and the remaining cites keeps untreated.
The questions are :
1.How can I build up the model with treatment in different years ?
2.I can generate the treatment variable and treatment*time variable.But how can I include the time dummy variable?
Thanks ! :D
Say if I would like to evaluate the effects of PolicyA on the GDP , for example. I have 10 cities in the dataset from 1990 to 2000. City 1 was treated in 1992 , city 2 was treated in 1995, city3 was treated in 1996,and the remaining cites keeps untreated.
The questions are :
1.How can I build up the model with treatment in different years ?
2.I can generate the treatment variable and treatment*time variable.But how can I include the time dummy variable?
Thanks ! :D