MeanNeighborDegree
MeanNeighborDegree[g] gives a list of mean neighbor degrees of vertices for the graph g.
MeanNeighborDegree[g,"In"] gives a list of mean neighbor in-degrees.
MeanNeighborDegree[g,"Out"] gives a list of mean neighbor out-degrees.
MeanNeighborDegree[{v->w,…},…] uses rules v->w to specify the graph g.
Please visit the official Wolfram Language Reference for more details and examples on core symbols.