Geert Booij is professor of general linguistics, well-known specialist in the subdiscipline of morphology, has published widely on this topic since 1977 in books and international journals. Recently he published a textbook on morphology with Oxford university Press: The Grammar of words (2005).Jaap van Marleis professor of language and culture. Specialist in research on American Dutch. Has published widely on morphology and its fate in language contact and language change.