1. Competitive Balance in the NFL
Measuring Competition: HHI =  (MSi)2
MSi = Market Share for a Team
= (Wins for that team / # of League Games)

3. Factors Affecting Competition
HHI = f (FA/SAL, EXPAN, EXPAN(1)
STRIKE, PLAYER TALENT, HHI(-1))
FA/SAL = Free Agency/ Salary Cap Year 1993
EXPAN= Expansion Year
EXPAN (1) = Year after expansion
STRIKE = Strike Year
Player Talent Concentration

4. dHHI & Upper Bound

5. PLAYER TALENT = HHIPF + HHIPA
HHIPF =  (Points Scoredi / Total Points Scored in the League)2
HHIPA =  (Points Scored Againsti / Total Points Scored Against in the League)2

6. VARIABLE DEFS & STATS

7. Results

8. RESULTS