Notten, P. van

perspective salmon perspective images image chain food chain future process group participant market development method problem management society research market optimist vellema nature theory optimist food chains environment change scenario management style industry interest aquaculture stakeholder university transparency controlist supply chain notten farming strategy uncertainty business wageningen university salmon aquaculture rotman actor dialogue approach project asselt style grid-group theory european variety transition worrywart system supply event paper foresight van asselt company netherland regulation salmon farming grid-group impact discussion issue heijden control action behaviour innovation provision organisation product controversy market optimist image economics research institute figure