In terms of economics, marketing is required when supply is greater than demand. This occurs when products, or projects, offered by industries and companies are greater than the number of customers who can buy the products, or finance the projects.
CITATION STYLE
Spagnulo, M., Fleeter, R., Balduccini, M., & Nasini, F. (2013). Marketing of Space Programs. In Space Program Management (pp. 97–115). Springer New York. https://doi.org/10.1007/978-1-4614-3755-0_3
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