Ecology, trade, and states in pre-colonial Africa

Trade (using ecological diversity as a proxy measure) across ecological boundaries promotes class stratification.

Test
Test Name	Support	Significance	Coefficient	Tail
Regression estimated by ordered probit	Supported	p<.05	`UNKNOWN`	`UNKNOWN`

Variables
Variable Name	Variable Type	OCM Term(s)
Class Stratification	`UNKNOWN`	Classes, Status, Role, And Prestige
Ecological Diversity	`UNKNOWN`	Location, Climate, Mineral Resources, Commercial Facilities, External Trade

Main Author	Published Year	Hypothesis	Supported	Variables Tested
Fenske, James	2014	Trade (using ecological diversity as a proxy measure) across ecological boundaries is associated with local democracy.	`UNKNOWN`	2	Cite Related Hypotheses More By Author
Fenske, James	2014	Ecological diversity promotes state centralization.	Supported	2	Cite Related Hypotheses More By Author
Nielsen, Francois	2004	Subsistence type will be significantly associated with class stratification, jurisdictional hierarchy, inheritance of office of local headman, inheritance of property, presence of games of strategy, and polygyny (299-306).	Supported	7	Cite Related Hypotheses More By Author
Winkelman, Michael James	2014	The prevalence of "legitimate" or institutionalized human sacrifice in a given society is associated with certain geopolitical conditions and demographic-ecological conditions (48).	Supported	11	Cite Related Hypotheses More By Author
Textor, Robert B.	1967	Hunter-gatherers, if they have class stratification, tend to base it on wealth (51, 106).	Supported	2	Cite Related Hypotheses More By Author