Boeing, Airbus, & Monopoly

Guys, I need some help. I signed up to do an extra-credit report (only about 3 to 5 minutes long) and speech about a topic we’ve covered in my Legal Studies class.

I was going to try and figure out if the monopoly Boeing and Airbus have on the airplane industry is illegal.

Can anyone direct me to an article or site that might help me find some answers.

Thanks.

Or perhaps I could talk about Boeing’s virtual monopoly on the market before Airbus really got going. Was it legal?

I need some help either way.