The whole practice of antitrust/competition law is basically about defining markets to serve whatever goal your client wants. If you're an underdog or regulator

The whole practice of antitrust/competition law is basically about defining markets to serve whatever goal your client wants. If you're an underdog or regulator looking to bust a trust or cartel, you argue that the market in question is narrowly defined and show evidence of abuse in that market. If you're defending antitrust/competition claims, you argue that the market is broadly defined and show evidence of competition. Rinse. Repeat. Charge $1,500 per hour per attorney.