Mongolian is an ordinary DOM (Differential Object Marking) language: the accusative case does not always occur on direct objects. This book investigates the phenomenon starting from the research question of how the Mongolian pattern is influenced by factors that cross-linguistically trigger DOM, such as referentiality, animacy, and topicality. It shows that looking at any of these factors on its own is not sufficient, but rather that DOM emerges from a complicated interaction of these factors. Apart from DOM, Mongolian also exhibits a specific type of Differential Subject marking (DSM), in...