In population surveys, an Internet option may improve the response rate, if prospective respondents prefer one method of data collection over another. An Internet response option, is relatively inexpensive and may appeal especially to younger people (who often have lower survey participation). However, there is no viable Internet sampling frame for population surveys, necessitating initial contact through another mode, such as a mailed survey. Due to the lack of universal Internet penetration in the United States, the option of sending a Web address alone is not feasible, as some respondents will not be able to access the survey.