id	keyword
ape-3939	network
ape-3939	japanese
ape-3939	groups
ape-3939	economy
ape-3939	companies
ape-3939	banks
ape-3939	keiretsu
ape-3939	ergm
ape-3939	analysis
ape-3939	economics
ape-3939	system
ape-3939	effect
ape-3939	vol