Is it possible in Pajek to calculate the betweenness centrality of the weighted graphs. Thank you, Karmen

It is not possible. Pajek does not take values into account when computing betweenness. Andrej

If you take into acount the values on the lines, the number of geodesics between two vertices will usually decrease. High betweeness will get the 'unavoidable' vertices - cut-vertices or end-vertices of bridges. Vlado