Good evening! I'm writing an academic paper and I pretend to build a diff-in-diff model using panel data. Stata is a new world for me, so I'm little bit confusing with some commands. The post in this link (https://www.statalist.org/forums/for...ith-panel-data) helped me a lot, but I have a simple question: Stata recognizes control variables automatically? For example, in the code below, Population, Unemployment and Avg_Month_Wage are recognized automatically as control variables?

Code: xtreg W_Trade_M Treat Post TreatPost Population Unemployment Avg_Month_Wage