Hello Statalist!


I want to make panel data from this:

ID roa2009 roa2010 roa2011 roa2012 bis2009 bis2010 bis2011 bis2012 ....


Can I make this data to panel data like this?

ID time roa bis
1 2009 ... ...
1 2010 ... ...
1 2011 ... ...
1 2012 ... ...
2 2009 ... ...
2 2010 ... ...
2 2011 ... ...
2 2012 ... ...

Thanks in advance. (I tried to google it, but no answers)