Howaldt, JürgenKopp, RalfSchwarz, Michael2015-12-012015-12-012015New frontiers in social innovation research978–1–137–50679–5978–1–137–54953–2978–1–137–50680–1978–1–137–50681–8http://hdl.handle.net/2003/3437410.17877/DE290R-16448enPalgrave Macmillan300Social innovations as drivers of social change - exploring Tarde's contribution to social innovation theory building10.1057/9781137506801.0001book part