Final answer:
Workers who are working for economic reasons or are part-time workers seeking full-time employment are called underemployed workers.
Step-by-step explanation:
The workers who are working for "economic reasons" or are part-time workers seeking full-time employment are called underemployed workers. These workers are trained or skilled for a particular type or level of work but are working in lower paying jobs or ones that do not utilize their skills. They are counted as employed, although they are not employed in the way they would like or need to be.