Effects of concussions in contact sports?

Source: http://spiutica.com 

• KEY ECONOMIC PRINCIPLES I’M ADDRESSING:
• People Respond to Incentives in Predictable Ways
• Institutions are the “rules of the game” that influence choices
• OVERALL RESEARCH QUESTION: Effects of concussions on sports and what are they doing to help improve conditions?
• SUB QUESTIONS
•  What are operations like the NFL/NHL etc. doing to improve conditions?
• What are the long-term effects on people's health?
•  Are the athletes being properly equipped?
•  How young are people being affected by this?
• RESOURCES FOR RESEARCH: Effects of concussions on sports and what are they doing to help improve conditions?
• DATABASES: (http://search.proquest.com/docview/1447232647/C6817AA8C6274CC7PQ/1?accountid=6222)
• (http://search.proquest.com/docview/214601405/C6817AA8C6274CC7PQ/3?accountid=6222)
• 
  
• WEBSITES:
• (http://weillcornellconcussion.org/about-concussions/long-term-effects-brain-injuries)
• (http://www.pbs.org/wgbh/pages/frontline/sports/league-of-denial/the-frontline-interview-lisa-mchale/
• http://www.bu.edu/cte/about/what-is-cte/)
• OTHER (OPTIONAL): None