Arnold Kling, in his Macro Lecture #13, writes,
I don't believe that any major economic journal has published a paper based on a conventional macro-econometric model in the past twenty-five years. You might just as well try to get into the American Economic Review by submitting porn.
Add to this what Nick Rowe says about macroeconomics:
Will fiscal (or monetary) policy work to prevent a recession? This is perhaps the central question of macroeconomics. We ought to know the answer, and we ought to have overwhelmingly good evidence to support our answer. But we don't....
The rest of his post explains why.