The origin of the word is still in dispute but most of the prominent theories state that it has indigenous roots.

One prominent and very popular theory attributes aging to a tight budget for food energy called caloric restriction.

The efficient-market hypothesis emerged as a prominent theory in the mid-1960s.

Doctors aren't sure what causes depression, but a prominent theory is altered brain structure and chemical function.

How this is supposed to work is a little less clear than in the previous two theories, but is still a prominent and notable theory.

A prominent theory is that an autoimmune reaction is involved.

Cultural Theory is an alternative to two other prominent theories of risk perception.

Organizational ecology has been a prominent theory in accounting for diversities of organizations and their changing composition over time.

Two prominent theories have arisen to explain away this discrepancy.

A brief introduction to the most prominent contingency-focused theories will follow.