calculate {HEAD ~ an out degree ratio} by dividing {TAIL ~ a number} of out degree correlation coefficients above a third threshold by a total number of out degree correlation coefficients 
calculate { HEAD ~ an out degree ratio } by dividing { TAIL ~ a number } of out degree correlation coefficients above a third threshold by a total number of out degree correlation coefficients
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH