Dynare finds the result more quickly than a two-instrument version of RamseySOE, so we didn’t notice the uniqueness. However, in the two-instrument version, we indeed realized it, very sensitive to our initval guess. So here is my question:
Will CMAES be helpful in Ramsey problem?
(I plan to substitute CMAES for fminsearch function)
Besides, your reply gives me the impression that the upper bound of the welfare of OSR-SOE, by deliberately choosing Taylor parameters, can dominate the lower bound of the welfare of Ramsey-SOE, by arbitrarily guessing initial values. Is it true?
I’m in no hurry 
