enroll in different contract types (such as fixed-price contracts, indexed, and hybrid). Switching is only practical if a customer is either buying from a utility, willing to pay an early termination fee, or is at the end of a contract with a provider. Certain U.S. states allow for consumer choice in electricity providers, with Texas being the most-widely watched deregulatory scheme. Many other states are surveying the Texas deregulatory model in order to use its design as a model for the imposition of free market forces within such other power markets. As of 2019, 19 U.S. states and the District of Columbia have "either full or partial retail choice." Along with aforementioned Maryland and Texas, electricity deregulation is current in Connecticut, Delaware, Illinois, Maine, Massachusetts, Michigan, Montana, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, and Rhode Island. Seven additional U.S. states began the process of electricity deregulation but have suspended efforts: Arizona, Arkansas, California, Nevada, New Mexico, Virginia, and Wyoming. In 2019, Arizona's regulatory agency (Arizona Corporation Commission) considered implementing retail electricity deregulation. The proposal was opposed by Arizona Public Service Co. (APS), an electric utility that provides electricity to 2.7 million people. APS said it was opposed because the change would "not be in the best interest of customers" because it would create issues surrounding reliability, "conflicts . . . with existing law," and clean energy implementation difficulties. A broad and diverse group of retail energy suppliers who share the common vision that competitive retail energy markets deliver a more efficient, customer-oriented outcome than a regulated utility structure. Retailers Include: AEP Energy , APG&E Energy Solutions , Calpine Energy Solutions , Constellations NewEnergy, INC , Crius Energy , Direct Energy Services LLC , Dynegy , ENGIE Resources , Entrust Energy , IGS Energy , Just Energy , Liberty Power , Next Era Energy Services , Nordic Energy Services, LLC , NRG Energy INC , Source Energy , Spark Energy , Starion Energy , Stream Energy , Talen Energy , TransCanada Power Marketing LTD. See also Community Choice Aggregation Deregulation Deregulation of the Texas electricity market Electricity market References External links A Misguided Criticism of Texas Electricity Deregulation, by Lynne Kiesling Electric power distribution