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