Example methods and apparatus to measure market statistics are disclosed. A disclosed example method includes retrieving a service penetration value from a managed data source, retrieving an Internet protocol (IP) address from a convenience data source, and identifying a household identification number associated with the retrieved IP address. The example method also includes retrieving household data associated with the household identification number, verifying a service provider name provided by the convenience data source, and adjusting a weight value of the retrieved household data when the service provider name provided by the convenience data source is different than a current service provider name. Additionally, the example method includes calculating service provider flow share based on the adjusted weight value and the service penetration value, and generating a report including the calculated service provider flow share.