Search Results       Your search for [subject]Birth control -- United States -- Econometric models returned 1 record.           The sexual activity and birth control use of American teenagers. by Levine, Philip B.; Cambridge: National Bureau of Economic Research, 2000. Subject: Teenagers -- United States -- Sexual behavior -- Econometric models; Birth control -- United States -- Econometric models; Teenage pregnancy -- United States -- Econometric models.          Add to Book Cart Relevance: 31.74%