Esfinge is a general domain Portuguese question answering system which has been participating at QA@CLEF since 2004. It uses the information available in the “official” document collections used in QA@CLEF (newspaper text and Wikipedia), but additionally it also uses information from the Web as an additional resource when searching for answers. Where it regards the use of external tools, Esfing...

In class, I focus on explaining the Keynesian model in words and with diagrams. I don’t walk through the underlying math, mainly because most students find diagrams easier to follow. However, going through the math at least once – at your own pace – will help you better understand the diagrams and how to use them correctly; and some students may find the math easier than the diagrams, or useful...