Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. David Kindness is a Certified Public Accountant (CPA) and an expert in the fields of ...

The price of a product is determined by the law of supply and demand. Consumers have a desire to acquire a product, and producers manufacture a supply to meet this demand. The equilibrium market price ...

In 335 B.C.E., Aristotle proposed that the heat of the male partner during intercourse determined sex. At least in the case of reptiles, Aristotle was on to something. What about in other animals? The ...

Since ancient times, scientists and philosophers have pondered the fundamental question of what makes some organisms male and some female. Some hypotheses were at least plausible—Greek philosopher ...

A letter of determination confirms a retirement plan's tax-advantaged status under ERISA. Employers using pre-approved plans generally don't need a determination letter. A determination letter doesn't ...