I’m new to Dynare, and I built a nonlinear model.When processing Bayesian estimation, I input two observational variables, output and investment. The question is, Since investment is more volatile than output, when removing the trend in the original data(HP filter), output is often less than investment.but Y=C+I，which means that consumption is negative, Is that right?What should I do?
Sincerely hope to get your help