“broaden competition” is correct and usable in written English.
You can use it when talking about increasing the number of participants or competitors in an activity, or when you want to refer to the effect of introducing more competition in a market. For example: The organization has adopted measures to broaden competition in the industry.
Q: If we accept that there is a desire to broaden the competition in government, to create a new party — if this party created by the Kremlin itself, can it be real competition?
The Google campaign against Microsoft's bid, to some degree, underlines their broadening competition.
In January, Hotwire added hotel reservations, broadening its competition with Priceline.
Détente is a means of broadening the competition: expanding contacts, opening the way to Western ideas and Western influence, weaving a web of economic interdependencies that raise the cost to the Soviet Union of stepping beyond the bounds of acceptable behavior.
"Resale will be yet another way to stimulate competition, broaden the range of services available, and make rates more attractive for users," Ms. Luz Álvarez said in a telephone interview from Mexico City.
Photo competition broaden horizons for rural children in Eastern Cape Children see cameras for the first time in their lives.
Notwithstanding these hurdles, representatives from the Department of Justice Antitrust Division, the Federal Trade Commission, and the European Commission made it clear in a recent series of speeches that they intend to broaden their patent and competition focus to go beyond traditional challenges such as patent misuse, or price fixing through licensing.
The ESI concludes that consolidation will intensify competition, increase traffic, improve access and broaden commercial opportunities.
But attempts to broaden that relationship will turn up areas of competition as well.
Antitrust economists might hate this idea, but perhaps it's time to broaden the discussion beyond how a decline in competition may hurt consumers, and to consider things other than narrow economic efficiency.
