Fig. 2From: Characterization of the firm–firm public procurement co-bidding network from the State of Ceará (Brazil) municipalitiesPanel a shows the degree distribution, D(k). The dashed black line represents the best exponential distribution fitted to the empirical distribution’s tail (\(k>5\)). Panel b shows the average clustering coefficient average per degree, C(k). The dashed black line shows the best linear fit. The results have been estimated from the entire graphBack to article page