Xtset Xtreg. Let us try with the QoG institutes time series cross section dataset which contains information about countries over time. Xtset country year delta.
Since one of my independent variables is clustered at the regional level. 1a xtset code year this is an unbalanced panel because there is missing data. Xtset and xtreg for panel data.
Year 1990 to 1999 panel variable.
Xtset without argumentsxtsetdisplays how the data are currently xtset. I tried several commands however none of. Xtset country year delta. Some other commands like clogit can also sometimes be used.