Re: [Gretl-users] difference between SVAR and VAR IRFs

2012-06-09 Thread Dr RJF Hudson
Hello, Dr Lucchetti I'm hoping for a leg up on your Cholesky comment please, because I'm a bit confused. Let's think of the expression X^T * A* X > 0 where A= LL^T ( A is symetric and positive definite) and X is real and non-zero ie all is as commonly known (eg, ' T ' = transpose, etc)

Re: [Gretl-users] difference between SVAR and VAR IRFs

2012-06-09 Thread Jack
On Sat, 9 Jun 2012, Muheed Jamaldeen wrote: > Hello! > > Also, the Cholesky is just one way of retrieving the structural shocks by > overcoming the identification problem. results from the cholesky > decomposition (which is basically a lower triangular matrix of the > variables) varies with the or

Re: [Gretl-users] difference between SVAR and VAR IRFs

2012-06-09 Thread Muheed Jamaldeen
Hello! Also, the Cholesky is just one way of retrieving the structural shocks by overcoming the identification problem. results from the cholesky decomposition (which is basically a lower triangular matrix of the variables) varies with the ordering of the variables. So an SVAR can use either a cho