The evolution of war:  a cross-cultural study

"The higher the level of political centralization, the more likely that field fortifications are used" (54)

Test
Test Name	Support	Significance	Coefficient	Tail
Phi coefficient	Supported	p<.05	.41	Two-tailed

Variables
Variable Name	Variable Type	OCM Term(s)
Centralization Of Politcal System	`UNKNOWN`	Territorial Hierarchy
Field Fortifications	`UNKNOWN`	Military Installations

Main Author	Published Year	Hypothesis	Supported	Variables Tested
Otterbein, Keith F.	1970	"The greater the percentage of professionals in the military organization, the more likely that field fortifications are used" (54)	Not Supported	2	Cite Related Hypotheses More By Author
Divale, William Tulio	1976	"Societies observed by females or by males who worked under optimal field conditions [ethnographer spent at least one year in the field and spoke the native language] indicate that female status is equal to male status or only slightly below as societal complexity increases" (194)	Supported	5	Cite Related Hypotheses More By Author
Gennaioli, Nicola	2007	Precolonial centralization will be positively correlated with public goods provisioning in Africa. (195)	Supported	2	Cite Related Hypotheses More By Author
Osafo-Kwaako, Philip	2013	Political centralization predicts increases in public goods and development outcomes.	Supported	3	Cite Related Hypotheses More By Author
Martin, M. Kay	1975	Horticultural subsistence activity will be negatively associated with political centralization (218).	No support claimed	3	Cite Related Hypotheses More By Author