Learn how to distinguish marginal costs by exploring their relationship with fixed and variable costs in production.

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.

Dependent variables change based on other inputs in financial models, affecting investment outcomes. Independent variables like earnings affect dependent variables, influencing metrics like P/E ratios ...

Saving money is a critical part of financial planning, and finding the right savings account is just as important. One of the things to consider when choosing a savings account is how interest is ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Dr. JeFreda R. Brown is a financial ...