COWBULLYN indicates whether household owned any milk cows or bulls. In some cases, the question referred to other animals, such as oxen, as well; see Comparability. The complementary variable COWBULLNUM reports the number of milk cows or bulls owned by the household.
The information in COWBULLYN is taken from the household record and applies to regular household residents, not temporary visitors. Researchers may wish to exclude visitors using the RESIDENT variable when women, children, or births are the unit of analysis, and using the HHRESIDENT variable when household members are the unit of analysis.