how do you add a history variable is there an autocorrelation variable for data when to use history flag in autocorrelation why can't i create y variable history flag variable why do we need a history flag variable when to use a binary variable for historical records can you create a binary variable that has a history flag which binary variable should be used to determine whether any historical data is biased? what is the history variable in a database what does history flag mean for variables what is the historical flag value how to use binary variables in excel which variable has the longest history how to use a history variable what is the binary variable a what is the binary variable to show how long a record is historical? how to use a history flag in panel data when adding a history to a data set how to do this what a variable mean in autocorrelation