Interaction term: multiple identical values

[Chiara LR]

Hello All,

I am having problem in creating my interaction term. This variable is obtained by multiplying banks*time. It is a panel dataset and I have a sample of 45 banks across 94 time periods identified by numerical variables (no strings). Unfortunately, when I am generating the interaction term bank*time I obtain multiple identical values (ex. bank n.3 * time 5=15, but also bank n.5 * time 3=15). Generating this variable using also the country in witch the country is located does not fix my problem.

Do you have any suggestions?

Thanks,
Chiara

[Carlo Lazzaro]

Chiara:
the best suggestion is to rely on -fvvarlist- notation instead of creating interactions (and categorical variables) by hand.