what are the lags in a dynamic regression model lags vs hours hourly spend vs lagged spend which lags on time ad spend how to model an hourly lag difference between lagged and early spend why is adspend a covariate what is the difference between hourly spend and lagged spend in dynamic regression how to calculate the lag for an hourly ad spend what would cause lag hourly spend is lagged ad spend at 6 am or 9 am lag hourly spend vs lagged spend what is the difference between lag and lag in regression when to lagged an adspend which is higher adspend or lag? how to model lags in dynamic regression models hourly spend versus lag what is lagged grp how to model lag