when is dependent variable in a regression model when is it necessary to include a dependent variable? when is it necessary to include a dependent variable in a regression model and which lag when is dependent variable used in regression when does lag need to be in regression when is the dependent variable in a regression model and which lag why is it necessary to include a lag in a regression model when is it necessary to include a dependent variable in a regression model when is it necessary to include the dependent variable when is it necessary to include the lag of the dependent variable in a regression model and which lag? when is it necessary to include a dependent variable in a regression model and which lag? when is it necessary to include the dependent variable in a regression model and which lag? why does a model need to use a dependent variable when is it necessary to include the dependent variable in a regression model and which lag when should lag be included in regression analysis when is it necessary to include lag of the dependent variable in a regression model and which lag when is it necessary to include the lag of the dependent variable? when is a dependent variable in r used when is it necessary to consider a dependent variable for regression model? when should we include a lag in regression