Conn. Gen. Stat. § 35-28: Acts unlawful when purpose or effect is restraint of trade or commerce.

Without limiting section 35-26, every contract, combination, or conspiracy is unlawful when the same are for the purpose, or have the effect, of: (a) Fixing, controlling, or maintaining prices, rates, quotations, or fees in any part of trade or commerce; (b) fixing, controlling, maintaining, limiting, or discontinuing the production, manufacture, mining, sale, or supply of any part of trade or commerce; (c) allocating or dividing customers or markets, either functional or geographical, in any part of trade or commerce; or (d) refusing to deal, or coercing, persuading, or inducing third parties to refuse to deal with another person.