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The Internet poses challenges to parents who want their children to take advantage of online resources but also want to protect their children from questionable content. Using data from 749 dyads of American parents and their teenage children with Internet access, this study finds that the majority of parents report regulating their teenage children's Internet use, but parents report more monitoring (61%) than teens report (38%). Multivariate regression analyses indicate fathers, younger parents, parents who use the Internet with their children, and parents with younger teens engage in a higher level of parental monitoring. This study provides a first look at parental monitoring of children's Internet use and points to the need to study family rules from both parents’ and children's perspectives. [ABSTRACT FROM AUTHOR]

Objective: To characterize Medicare expenditures on initial breast cancer care and examine variation in expenditures across hospital referral regions (HRRs).Data Source: We identified 29,110 women with localized breast cancer diagnosed in 2005-2008 and matched controls from the Surveillance, Epidemiology, and End Results-Medicare linked database.Study Design: Using hierarchical generalized linear models, we estimated per patient Medicare expenditure on initial breast cancer care across HRRs and assessed the contribution of patient, cancer, and treatment factors to regional variation via incremental models.Principal Findings: Mean Medicare expenditure for initial breast cancer care was $19,255 per patient. The average expenditures varied from $15,053 in the lowest-spending HRR quintile to $23,480 in the highest-spending HRR quintile. Patient sociodemographic, comorbidity, and tumor characteristics explained only 1.8 percent of the difference in expenditures between the lowest- and highest-spending quintiles, while use of specific treatment modalities explained 14.5 percent of the difference. Medicare spending on radiation therapy differed the most across the quintiles, with the use of intensity modulated radiation therapy increasing from 1.7 percent in the lowest-spending quintile to 11.6 percent in the highest-spending quintile.Conclusions: Medicare expenditures on initial breast cancer care vary substantially across regions. Treatment factors are major contributors to the variation. [ABSTRACT FROM AUTHOR]