st: AW: RE: xtabond2: Proper use of ivstyle(.)

["Niko Wrede" <wrede@wiso.uni-koeln.de>]

Hi Jean,
thanks for replying. 
I found out, that 

iv(l2.X1, equ(level)) iv(l2.X1, equ(diff)) 

is much closer to the ... equ(both) command than

iv(l2.X1, equ(level)) iv(l2D.X1, equ(diff)) 

Thus, I believe that the equ(diff) suboptions will first difference the
variable and should not be given as l2d but as l2. When using ... iv(l2.X1.
equ(diff)) there remains only a slight difference.