Mayer et al.] had very high potential for societal impact as the methods and results of the work could be directly used to develop, monitor, and support EU policies on resource efficiency and the circular economy.. .. [Yeow and Cheah] demonstrated the use of disaggregated commodity flow data in informing the spatial distribution of material use. The paper included. .. commodity flow data-as a fresh input to urban metabolism studies."] We are pleased to announce the winners of the seventh annual Graedel Prizes for the Journal of Industrial Ecology's (JIE) best papers. Each year, prizes are judged in the categories of junior first author (where the lead author is under the age of 36 on the date of on-line publication) and senior first author (for lead authors aged 36 or over). Winners receive a free membership in the International Society for Industrial Ecology and US$750, which is generously funded by the Nickel Institute, GE, A-1 Recycling, the Raw Materials Group Stockholm, Martha Walters, and AT&T in honor of Thomas Graedel, a founder of the field of industrial ecology. The rules for the Graedel Prize and members of the adjudication committee are provided on the journal's website. 1 Papers, based on the year of publication on-line, are nominated by members of the JIE Editorial Board or the Prize Committee. They are then evaluated against the criteria of: (a) professional merit; (b) contribution; and (c) presentation quality. Previous winners of Graedel