summarize the key points of the paper:Robertson, Shanthi. 2011. "Cash Cows, Backdoor Migrants, or Activist Citizens? International Students, Citizenship, and Rights in Australia." Ethnic and Racial Studies 34 (12): 2192-2211.

In "Cash Cows, Backdoor Migrants, or Activist Citizens? International Students, Citizenship, and Rights in Australia," Shanthi Robertson explores the complexities surrounding the status of international students in Australia. Here are the key points from the paper:

**International Students as Economic Assets**: The paper discusses how international students are often viewed as "cash cows" contributing significantly to the Australian economy through tuition fees and living expenses.

**Marginalization and Rights**: Robertson examines the marginalization of international students within the broader discourse on citizenship and rights in Australia. She highlights the limited rights afforded to these students, contrasting their economic contributions with their lack of political and social rights.

**Backdoor Migration Argument**: The author critiques the perception of international students as "backdoor migrants" seeking to transition into permanent residency. This narrative often leads to negative stereotypes and misunderstandings about the motivations and experiences of international students.

**Activism and Agency**: Despite their marginalized status, many international students actively engage in advocacy and community organizing. The paper highlights their potential to become "activist citizens," challenging existing frameworks of citizenship and participation.

**Policy Implications**: Robertson calls for a re-evaluation of policies surrounding international students, advocating for more inclusive approaches that recognize their contributions and rights beyond economic perspectives.

Overall, the paper provides a critical lens on the multifaceted roles of international students in Australia, advocating for a more nuanced understanding of their place within society.