Presented in two parts, this article proposes a research programme devoted to examining 'processes of economization'. In the first instalment, published in Economy and Society 38(3) (2009), we introduced the notion of 'economization'. The term refers to the assembly and qualification of actions, devices and analytical/ practical descriptions as 'economic' by social scientists and market actors. Through an analysis of selected works in anthropology, economics and sociology, we discussed the importance, meaning and framing of economization, unravelling its trace within a variety of disciplinary backgrounds. This second instalment of the article explores what it would mean to move this research programme forward by taking processes of economization as a topic of empirical investigation. Given the vast terrain of relationships that produce its numerous trajectories, to illustrate what such a project would entail we have limited ourselves to the examination of processes we call 'marketization'. These processes, which constitute but one modality of economization, are discussed here from five vantage points: the things in the market, agencies, encounters, prices and market maintenance.