lastcit.game(n, edges=1, agebins=n/7100, pref=(1:(agebins+1))^-3,
directed=TRUE)
cited.type.game(n, edges=1, types=rep(0, n),
pref=rep(1, length(types)),
directed=TRUE, attr=TRUE)
citing.cited.type.game(n, edges=1, types=rep(0, n),
pref=matrix(1, nr=length(types), nc=length(types)),
directed=TRUE, attr=TRUE)