Many students incorrectly use concepts of methodology and methods interchangeably as if they were the same thing. Your EE will get off to a great start if you are knowledgable and mindful of the differences. There is more information specific to economics in the documents below, but very basically, methods are the tools or approaches used, for example interviews. In contrast, methodology refers to the theoretical framework that underpins your research. Professors Clough and Nutbrown offer a useful summary when they write "methods as being some of the ingredients of research, while methodology provides the reasons for using a particular research recipe." Here is a helpful "cheat sheet" produced by The University of Western Australia on these topics. For IBDP students you should try and conceptualise methodology as related to ToK style considerations.