I got an offer for economic history at LSE and I will confirm it. I think it is definitely a very good course if u want to go into IB. It does not only depend on what exactly u are learning, furthermore it is important that u learn to think analytical, critical and "outside of the box" haha. also if u get into that course and u manage to survive, it shows that u can work very hard! And I think IBs want to have people who work very hard, focused and can "analyze" with a critical view. I did not choose the subject, because I want to go into IB, I am just passionated about the subject and got my German Abitur with related subjects.