Learn what flow and stock variables mean in simple terms. Understand how income, wealth, GDP, and debt connect through time and why this matters in economics and everyday life.

The amount of money many companies spend is in many ways directly proportionate to how much they produce. That is, there are a lot of variable costs that come with running a company. These costs are ...

Variables hold a wide variety of information temporarily. The JavaScript data types that can be stored in a variable include: JavaScript variables can hold a few other kinds of data, but these are by ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Covariance indicates the relationship ...

Every business has operating expenses — that is, the costs of running the business. These expenses can generally be classified in two ways: Fixed expenses and variable expenses. Understanding the ...

Steven Nickolas is a writer and has 10+ years of experience working as a consultant to retail and institutional investors. David Kindness is a Certified Public Accountant (CPA) and an expert in the ...