Final answer:
Some Puerto Ricans were working in various jobs in the informal economy during the time of anthropologists' research, including under-the-table nannies, gardeners, housecleaners, unlicensed street vendors, and taxi drivers.
Step-by-step explanation:
During the time of anthropologists' research in Puerto Rico, some Puerto Ricans were working in jobs in the informal economy such as under-the-table nannies, gardeners, housecleaners, unlicensed street vendors, and taxi drivers. Additionally, there were those who ran informal businesses like daycares or salons from their houses. These jobs are part of the informal economy, which refers to economic activities that are not regulated and often go unreported, making it difficult to estimate their exact numbers and contributions to the overall economy.