These are the values of the tail power law exponent (γt) for all networks to which the statistic applies and for which it was computed. In total, it has been computed for 1,231 networks.
The power law exponent (γt) measures the slope of the degree distribution, assuming that it is a power law. This value is computed by taking into account only the tail of the degree distribution.
The full definition of the tail power law exponent as well as its properties and relationships to other graph statistics can be found in the KONECT handbook.