Quaternary activities in the ‘Knowledge Sector’ are specialised tertiary activities that require their own categorization. From mutual fund managers to tax advisors, software engineers, and statisticians, need for and consumption of information-based services has increased dramatically. This group includes employees who work in offices, elementary schools, and college classrooms, hospitals and physicians’ offices, theatres, accountancy, and brokerage businesses. Quaternary tasks, like some tertiary services, can be outsourced. They aren’t reliant on resources, aren’t influenced by the environment, and aren’t always market-driven.
Quinary activities focus on the creation, reorganisation, and evaluation of fresh and innovative ideas, and also interpretation of data and new technology usage and assessment. ‘Gold collar’ professions are a subset of the tertiary sector that reflect the particular and highly compensated abilities of top business executives, government officials, scientific researchers, legal and financial advisors, and others. Their significance in the structure of modern economies transcends their numbers by a large margin. Quinary actions are carried out by the highest level of decision-makers or policymakers.
Quinary economic activities are sometimes regarded as a subset of quaternary economic activities, and sometimes as a different category, depending on whose economist or geographer you consult. The primary difference between quinary and quaternary is that quinary requires high-level thinking and decisions based on extensive research and data, whereas quaternary does not. A quinary economic activity is something like ecotourism, which mixes environmental conservatism with the tourism sector.