lag bounds in a regression
[bounds_out]=lagbounds(bounds_in,l)
bounds_in = the original bounds
l = the lag (positive or negative, if you want to extend bounds in the past)
bounds_out = the lagged bounds
lagbounds(['1985q2';'1997q4'],3) // Provides the (2x1) vector: // ['1986q1' // '1997q4'] grocer_boundsvar=lagbounds(grocer_boundsvarb,-grocer_l-1) // taken from function cadf