IMF published a paper n°10/56: Structural Models in Real Time by Jaromir Benes, Kevin Clinton, Marianne Johnson, Douglas Laxton, and Troy Matheson. This paper outlines a simple approach for incorporating extraneous predictions into structural models and illustrates the approach using a small quarterly structural and real-time data for the United States. see:
http://www.imf.org/external/pubs/cat/longres.cfm?sk=23686. 0