adding rows

[Soyoung Han]

I have monthly U.S. import data by exporter and by product from 2012 to 2017. I realize that I am missing all January data, such as 201201, 201301 and so on. Could someone help me how to create January data with import = 0 for each exporter and each product? Thank you!

[Amin Sofla]

You might find this page useful.
FAQ 12.1: “We can understand your dataset only to the extent that you explain it clearly. The best way to explain it is to show an example. The community-contributed command dataex makes it easy to give simple example datasets in postings. It was written to support Statalist and its use is strongly recommended. Usually a copy of 20 or so observations from your dataset is enough to show your problem. See help dataex for details”.

[Soyoung Han]

Thank you!