University of Natural Resources and Life Sciences, Vienna Department of Economics and Social Sciences Institute of Social Ecology (SEC) Nesting actors and organizations into a biophysical multi-level monitoring framework for a sustainable circular economy Wiedenhofer, Dominik 1, *, Stefan Pauliuk 2 , Andreas Mayer 1 , Doris Virág 1 , Willi Haas 1 1 … Institute of Social Ecology (SEC), Department of Economics and Social Sciences, University of Natural Resources and Life Sciences, Vienna, Austria 2 … Industrial Ecology Group, Faculty of Environment and Natural Resources, University of Freiburg, Germany * … corresponding author This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 741950).