# Intellectual property is controversial among some.[who?][1] See anti-copyright and criticism of intellectual property.
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# Understanding Principles of Politics and the State, by John Schrems, PageFree Publishing (2004), page 234
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# Hann, Chris A new double movement? Anthropological perspectives on property in the age of neoliberalism Socio-Economic Review, Volume 5, Number 2, April 2007, pp. 287-318(32)