Спасибо.

Люблю.

appropriative activities не имеет никакого смысла и на неологизм совсем не тянет. С тем же успехом можно написать asdfghjkl и назвать это авторским неологизмом

Кем называется? Поискал на Yahoo и в Google - не попалось. Поискал foraging economy и вот:

By the 1930's, enough first hand ethnographic data about the cultures of the world had been gathered for anthropologists to understand that there is a better way of categorizing them. They based their distinctions primarily on differences in subsistence patterns i.e., sources and methods a society uses to obtain its food and other necessities. This focus on economic differences proved to be useful because much of the rest of a culture is directly related to its economy. If you know what the subsistence base is, it is possible to predict many of the other basic cultural patterns... Using this approach, anthropologists divided the cultures of the world into four basic subsistence types:

1. Foraging (hunting and gathering wild plants and animals)
2. Pastoralism (herding large domesticated animals)
3. Horticulture (small-scale, low intensity farming)
4. Intensive agriculture (large-scale, intensive farming)

This classification system is still used in anthropology today due to its usefulness for understanding human cultural diversity. However, the last category, intensive agriculture, is sometimes nuanced by expanding it to include 20th and 21st century industrial and post-industrial economic systems.
http://anthro.palomar.edu/subsistence/sub_1.htm

А в статье из Британской энциклопедии про hunters and gatherers так и написано - foraging economy.