The article deals with an applied approach in economics known as input-output (IO) as developed by Wassily Leontief. The paper revisits Leontief’s analysis of IO to reconstruct a concept of technology . The concept rests upon an analysis of Leontief’s epistemological-methodological assumptions and the premises of his input-output model regarding interdependence. We argue that Leontief’s concept of technology highlights the physical process of technology in two senses: As concrete flows of material stuff used in economic production in the sense of a particular ‘recipe’; but also as emergent systemic effects of that particular ‘recipe’ throughout an economy, or indeed throughout a socio-ecological system. This contrasts with other approaches in the social sciences that understand the materiality of technology largely in terms of objects, artifacts, and infrastructure.
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