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Zegarra Pinto, José; Peche Loayza, Luwing (August 2017). Contractual stability and its relationship with the political process of law-making: An analysis of Peru’s public procurement and the principles of the Agreement on Government Procurement with the World Trade Organization (SECO Working Paper Series 14/2017). Bern, Switzerland: SECO, World Trade Institute, University of Bern