Table 4. Kendall’s rank correlation coefficient between GDP per capita, spending on R&D, number of universities, indexed journals and total number of research documents, citations per document, H-index in various science and social sciences subjects among Asian countries during the period 1996–2011.

Parameters	Documents	Citation per documents	H-Index
GDP per capita (US$)	τ = 0.136	τ = −0.032	τ = 0.107
	p = 0.217	p = 0.778	p = 0.333
Spending on R&D	τ = 0.447	τ = 0.139	τ = 0.457
	p<0.0001	p = 0.226	p<0.0001
Universities	τ = 0.532	τ = 0.027	τ = 0.475
	p<0.0001	p = 0.814	p<0.0001
Indexed journals	τ = 0.601	τ = 0−0.02	τ = 0.536
	p<0.0001	p = 0.872	p<0.0001

τ (tau) = Kendall’s rank correlation coefficient.

p =  p value.