From the article: "For starters, families have access to housing and health care through the military, and at least one parent has a job." "Prudence Carter, a

From the article: "For starters, families have access to housing and health care through the military, and at least one parent has a job." "Prudence Carter, a Brown University sociologist who studies educational inequality, said the Defense Department’s results showed what could happen when all students were given the resources of a typical middle-class child: housing, health care, food, quality teachers." The article author argues that multiple factors contribute to this outcome, without identifying a dominant factor. Are you arguing that the selection effects you describe are the dominant factor?