This is usually called a recession.
The New Economic Policy
Production
New York
The stock market does not lead or affect the economic but does tell you how the economic is doing. You might want to call it an index which tell you in advance if the companies in such economic are making improves or declines.
People who study marine biology are known as marine biologists. They specialize in the study of marine organisms, ecosystems, and environments.
The study of frogs is called herpetology. It is a branch of zoology that focuses on the study of amphibians and reptiles.
Marine biology and include (phycology, invertebate zoology, ichthylogy)
A zoologist.
A zoologist, zoology is the study of animals.
The people that study ruins are archaeologist.
A zoologist= zoo- museum of animals _ologist-specialist in _
People who study pathology are called pathologists.
People who study psychology are called psychologists.
People who study bats are called chiropterologists.
Demographers.
Zoologists.