The new book by Hans Widmer (aka P.M., author of bolo'bolo) is now published. "Auf den Boden kommen"...
"Calculating values of the commons"
Here is a method for valuing the multidimensional aspects of urban commons.
L200: Also your space
L200 is a collective space in a very central and visible locations in the city of Zurich, with an area of 75 sqm that may be flexibly organized for various uses throughout the day.