Raymond Boyd/Getty Images The presidential election cycle theory posits that equity market returns follow a predictable pattern each time a new U.S. president is elected. The theory was developed ...

Here we explore what the theory of general relativity is and how it affects space-time. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

There’s an arcane concept from the 1700s that underpins the attack on reproductive rights: the idea that women are incapable of making their own decisions.

Learn about our editorial policies According to the quantity theory of money, the general price level of goods and services is proportional to the money supply in an economy. If the amount of ...