Finding the right fit between students’ reading ability and textbooks is very important for comprehension. Readability studies aim to analyse texts to find the right fit between students and texts. In this literature review, readability studies are classified under quantitative, qualitative and combined quantitative-qualitative readability approaches. The quantitative approach includes readabil...

Systems of linear constraints are examined from a qualitative point of view. A property is said to be qualitative if it holds for all possible parameter values of certain prefixed sign patterns. In economics, such an approach has been traditionally taken within the perspective of comparative static analysis. However, the results obtained in this area appear somewhat limited in practical applica...