In modern economic models that break industry into five sectors – primary, secondary, tertiary, quaternary and quinary – industry ... worker is focused on one activity was found to be more ...

They include the primary, secondary ... of the spectrum, the tertiary and quaternary sectors, representing the services and knowledge-based economy, are engaged in activity that is not directly ...

Industry is any economic ... activity which creates jobs and generates income. All industry is made up of four sectors that are a linked together like a chain: primary, secondary, tertiary and ...