Missing observation

Dear Dynare users,
I have two questions about missing observations:

  1. I want to know if it makes any difference in estimation command or Dynare recognize the missing data itself?
  2. how should I enter non-observed data in my data M file? (they are empty in my excel file!)

any help would be much appreciated.

  1. Dynare will automatically deal with any NaN in you data. It will use the Kalman filter on those missing observations.
  2. Code them as NaN which is the equivalent to empty in Excel.