 Most theorists agree that for markets to come into existence, certain institutions need to be in place. Central among these are property rights and the legal institutions needed for enforcing  contracts.[9]  The question of enforceable property rights plays as an important role for evaluating markets in countries with weak governance structures. There, the ability to enforce one’s rights can be distributed very unequally, so that free markets can exacerbate these previous injustices. The question of which property rights can be enforced is one of the main determinants (apart from outright bans) of which markets can exist in a society. For example, in most countries one cannot sell oneself into slavery, as courts of law would not enforce such a contract. An area where this question about property rights and hence marketability is fiercely contested are intellectual property rights, where some people argue that our traditional notions of property rights are not suitable for goods that can be reproduced at extremely low costs, such as digital contents (e.g., Shiffrin 2007; Boutang 2011, ch. 4).