一个简单的数学模型。3名一个档次。假设前三名校毕业值80万。下一档只有前一档85%的价值。
| College Rank | Worthy each year | Diff for 9 ranks for each year | 
| 1 | 200000 | 0 | 
| 2 | 200000 | 0 | 
| 3 | 200000 | 0 | 
| 4 | 170000 | 0 | 
| 5 | 170000 | 0 | 
| 6 | 170000 | 0 | 
| 7 | 144500 | 0 | 
| 8 | 144500 | 0 | 
| 9 | 144500 | 0 | 
| 10 | 122825 | 77000 | 
| 11 | 122825 | 77000 | 
| 12 | 122825 | 77000 | 
| 13 | 104401 | 65000 | 
| 14 | 104401 | 65000 | 
| 15 | 104401 | 65000 | 
| 16 | 88741 | 55000 | 
| 17 | 88741 | 55000 | 
| 18 | 88741 | 55000 | 
| 19 | 75430 | 47000 | 
| 20 | 75430 | 47000 | 
| 21 | 75430 | 47000 | 
| 22 | 64115 | 40000 | 
| 23 | 64115 | 40000 | 
| 24 | 64115 | 40000 | 
| 25 | 54498 | 34000 | 
| 26 | 54498 | 34000 | 
| 27 | 54498 | 34000 | 
| 28 | 46323 | 29000 | 
| 29 | 46323 | 29000 | 
| 30 | 46323 | 29000 | 
| 31 | 39375 | 24000 | 
| 32 | 39375 | 24000 | 
| 33 | 39375 | 24000 | 
| 34 | 33469 | 21000 | 
| 35 | 33469 | 21000 | 
| 36 | 33469 | 21000 | 
| 37 | 28448 | 17000 | 
| 38 | 28448 | 17000 | 
| 39 | 28448 | 17000 | 
| 40 | 24181 | 15000 | 
| 41 | 24181 | 15000 | 
| 42 | 24181 | 15000 | 
| 43 | 20554 | 12000 | 
| 44 | 20554 | 12000 | 
| 45 | 20554 | 12000 | 
| 46 | 17471 | 10000 | 
| 47 | 17471 | 10000 | 
| 48 | 17471 | 10000 | 
| 49 | 14850 | 9000 | 
| 50 | 14850 | 9000 | 
| 51 | 14850 | 9000 |