It would also be possible to choose just one residual in each equation, eg resl in the equation for Asl and so on. This is a more restrictive approach, yielding a matrix of coefficients that is diagonal with equal elements 3/11 -~- Y22 = "Y33, all negative ie
requiring that the shares adjust towards equilibrium each at the same rate. However, we have chosen the more general method, with resl and res2 in each equation, allowing adjustment at different rates.