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union labour worker chain study process value relation production level development value chains condition management issue example policy factory paper model trabalhadore pegler sindicato manau analysis modernisation brazilian brazil empresa employment workplace employer product strategy london trade market consul labour conditions structure question right governance change trabalho outcome control company research claro impact system context region country quality theory university journal power security perspective buyer identity number economy network organisation state consideration attitude ência interest discussion concept world labour process interview case studies brastemp-rio
