In Portugal, studies of transformations since the mid-1950s in colonial social research have focused on the colonial school in Lisbon or other bodies directly under the supervision of the metropolitan administration. Nonmetropolitan initiatives have been neglected and the social-scientific undertakings of the Centro de Estudos da Guiné Portuguesa (CEGP), in particular, have been only marginally dealt with. This article maps CEGP's creation in Bissau, in 1945, and its social-scientific activity not only to establish its precedence but also to highlight local colonial enterprise and to specify its imprint upon developments in the metropole. It addresses CEGP's immediate context and main actors, institutional setting, research activities, publications, and other scientific outlets, to then put forward some concluding remarks regarding the epistemic reach of overseas governmental measures and the practical effects, in metropolitan colonial policies and scientific research, of peripheral imperial bureaucratic knowledge. 1 | INTRODUCTION As shown most clearly by the historian Cooper (2004) for the British and French cases, science, in general, and the social sciences, in particular, were instrumental to a new phase of colonial rule, after World War II, motivated by the emergence of new political movements in the European colonies and characterized by new projects of economic development and social modernization. In the same article, Cooper further noticed how this relationship between science and empire determined not only the emergence of certain government technologies but also the advancement of development economics and sociological modernization theory as such. More recently, focusing on the British and French cases, the sociologist Steinmetz (2014, 2017) pointed to the centrality of late colonial rule in the development of academic sociology as a discipline, going as far as to call it a "child of empire." Bearing in mind its long-standing authoritarianism (1926-1974), colonial wars (1961-1974), and late African decolonization (1975), similar arguments can and have been made for the Portuguese case. Indeed, in Portugal, the social sciences were also instrumental to a new phase of colonial rule, aptly described as "repressive developmentalism," from the mid-1950s onwards (Jerónimo, 2015), and the same relationship between science and empire-building ultimately gave rise to some of the earliest modern social anthropology (see R. Pereira, 2005) and to one of the first two institutional poles of modern sociology in the country (Ágoas, 2013). 1 There, studies about the epistemic shifts after World War II in the context of colonial scientific research, namely the growing use of social-scientific instruments to produce information deemed useful from the imperial point of view, have been focused on the activities of the colonial school in Lisbon (Escola Superior Colonial), upgraded in 1960s to become a faculty of social sciences and colonial policy (Instituto Superior de Ciências Sociais e Política Ultramarina), and on ot...