Ethnology

"An anthropological study that systematically compares similar cultures. An example of an ethnological study would be a comparison of what cultures are like in societies that have economies based on hunting and gathering rather than agriculture. The data for this sort of ethnology would come from the existing ethnographies about these peoples. In other words, an ethnology is essentially a synthesis of the work of many ethnographers". http://anthro.palomar.edu/tutorials/cglossary.htm