The workforce involved in design and development, marketing, projects are known as:

Thin Air Economy/Knowledge Economy

The correct answer is Option (4) - Thin Air Economy/Knowledge Economy.

In contrast to previous eras, the global economy is no longer primarily agricultural or industrial in its basis. The weightless economy is one in which products have their base in information, as in the case with computer software, media and entertainment products and internetbased services. A knowledge economy is one in which much of the workforce is involved not in the physical production or distribution of material goods, but in their design, development, technology, marketing, sale and servicing. It can range from the neighbourhood catering service to large organisations involved in providing a host of services for both professional meets like conferences to family events like weddings. We have a host of new occupations that was unheard of a few decades ago, for instance event managers.