Last year I looked at NCAA FBS bowl game payout inequality to bowl participants, and found that there is a substantial level of payout inequality. Now I am turning my attention to income (or revenue) inequality at FBS and non-FBS schools that are in USA Today's NCAA athletic department database. As I stated yesterday, not all schools are in the USA Today's database.
Later I will investigate the Equity in Athletics data. The advantage is that I can include more schools and look at total revenue by sport, but for now, I using USA Today's database since I am interested in revenue inequality among various revenue streams in athletic departments, not solely total revenue at athletic departments.
Economist's measure income inequality using a Gini coefficient. The Gini coefficient measures the total difference between perfect income equality and the actual income distribution which is called a Lorenze curve. For those interested - here's a step-by-step guide to calculate the Gini coefficient.
Given we have an income inequality measure and NCAA athletic department income, let's take a look at the various athletic department's revenue streams in the USA Today database from 2006 to 2011 by FBS and non-FBS schools. The table below has the Gini coefficients. As I expected FBS schools in general have greater revenue inequality than non-FBS schools except for ticket sales for each of the seasons during this time period and contributions in 2007, 2009 and 2011. Otherwise FBS schools have greater income inequality than non-FBS schools.
| Gini | Gini | |||
| 2006 | FBS | Non-FBS | ||
| Ticket Sales | 0.4988 | 0.5693 | ||
| Student Fees | 0.5708 | 0.4753 | ||
| School Funds | 0.5310 | 0.4361 | ||
| Contributions | 0.5852 | 0.5315 | ||
| Rights & Licensing | 0.4390 | 0.3919 | ||
| OtherRevenue | 0.3882 | 0.3637 | ||
| Total Revenue | 0.3492 | 0.2540 | ||
| Generated Revenue | 0.4685 | 0.3809 | ||
| Gini | Gini | |||
| 2007 | FBS | Non-FBS | ||
| Ticket Sales | 0.5067 | 0.5610 | ||
| Student Fees | 0.5641 | 0.4882 | ||
| School Funds | 0.5137 | 0.4441 | ||
| Contributions | 0.4971 | 0.5398 | ||
| Rights & Licensing | 0.4474 | 0.3790 | ||
| OtherRevenue | 0.3750 | 0.3629 | ||
| Total Revenue | 0.3293 | 0.2601 | ||
| Generated Revenue | 0.4469 | 0.3747 | ||
| Gini | Gini | |||
| 2008 | FBS | Non-FBS | ||
| Ticket Sales | 0.4964 | 0.5818 | ||
| Student Fees | 0.5767 | 0.4917 | ||
| School Funds | 0.5108 | 0.4299 | ||
| Contributions | 0.5165 | 0.5121 | ||
| Rights & Licensing | 0.4525 | 0.3710 | ||
| OtherRevenue | 0.4046 | 0.3273 | ||
| Total Revenue | 0.3333 | 0.2525 | ||
| Generated Revenue | 0.4503 | 0.3648 | ||
| Gini | Gini | |||
| 2009 | FBS | Non-FBS | ||
| Ticket Sales | 0.5061 | 0.5704 | ||
| Student Fees | 0.5832 | 0.5102 | ||
| School Funds | 0.4983 | 0.4037 | ||
| Contributions | 0.5108 | 0.5631 | ||
| Rights & Licensing | 0.4465 | 0.3617 | ||
| OtherRevenue | 0.4946 | 0.3212 | ||
| Total Revenue | 0.3219 | 0.2496 | ||
| Generated Revenue | 0.4485 | 0.3640 | ||
| Gini | Gini | |||
| 2010 | FBS | Non-FBS | ||
| Ticket Sales | 0.5074 | 0.5771 | ||
| Student Fees | 0.5817 | 0.5127 | ||
| School Funds | 0.5361 | 0.3992 | ||
| Contributions | 0.5394 | 0.5295 | ||
| Rights & Licensing | 0.4538 | 0.3539 | ||
| OtherRevenue | 0.4071 | 0.2982 | ||
| Total Revenue | 0.3380 | 0.2433 | ||
| Generated Revenue | 0.4602 | 0.3491 | ||
| Gini | Gini | |||
| 2011 | FBS | Non-FBS | ||
| Ticket Sales | 0.5131 | 0.5687 | ||
| Student Fees | 0.5901 | 0.5071 | ||
| School Funds | 0.5449 | 0.4017 | ||
| Contributions | 0.4962 | 0.5309 | ||
| Rights & Licensing | 0.4544 | 0.3377 | ||
| OtherRevenue | 0.4073 | 0.2891 | ||
| Total Revenue | 0.3250 | 0.2400 | ||
| Generated Revenue | 0.4521 | 0.3415 | ||