Adverse selection occurs when one party in a transaction has more information than the other, especially in insurance and finance-related activities.
For other uses of Ada, see Ada (disambiguation). Ada is a city in and the county seat of Pontotoc County, Oklahoma, United States. The population was 16,810 at the 2010 census, an increase of 7.1 percent from 15,691 at the 2000 census. The city was named for Ada Reed, the daughter of an early settler, and was incorporated in 1901.
Tulsa County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 603,403, making it the second-most populous county in Oklahoma, behind only Oklahoma County. Its county seat and largest city is Tulsa, the second-largest city in the state. Founded at statehood, in 1907, it was named after the previously established city of Tulsa. Before statehood, the area was part of both the Creek Nation and the Cooweescoowee District of Cherokee Nation in Indian Territory.