This thesis looks at the evolution of dairy farming and agrarian systems in New Zealand. It explains and characterizes the original path followed by dairy production in this country, which relied on low-input grazing systems until the 90s before moving away from it. It aims also at describing mechanisms underlying the emergence of financialised dairy production structures. Finally, we assess the socio-economic implications of both the shift toward higher-input dairy systems and the financialization of dairy production. This research uses the theoretical framework of Comparative agriculture supplemented by the Anglo-Saxon branch of Agrarian studies. It relied on the analysis-diagnosis the agrarian situation of two small rural areas (the Uppe...