he National Cooperative Business Association is the lead national membership association for co-ops in all sectors of the economy. Our mission is to develop, advance and protect cooperative enterprise. Move up to a Trusted Address. Click here to register. Copyright © NCBA 1996-2007 New! A Day in the Life booklet that describes how cooperatives across the nation have an impact on our nations economy. Co-op Jobs - Career Opportunities New! View presentations from NCBA's 13th Annual Conference ...