Recently in a test I was asked to describe the modified IS-LM framework. I assumed I was being asked the IS-LM-BP model, since it modifies the traditional IS LM model by adding a BP curve.
I looked up on a couple of references (Macroeconomics by Dornbusch, and Macroeconomics by Olivier Blanchard) but they have no reference to it. Looking the term up on a search engine only throws results about papers that suggest a modification to the IS LM model.
What exactly is a modified IS-LM framework?