Yarilet Perez is an experienced multimedia journalist and fact-checker with a Master of Science in Journalism. She has worked in multiple cities covering breaking news, politics, education, and more.

Oxford, UK. The concept of equilibrium is one of the most central ideas in economics. It is one of the core assumptions in the vast majority of economic models, including models used by policymakers ...

Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Consumer surplus is the difference between what ...

Many situations in economics are complicated and competitive. New research raises the question of whether many theories in economics may suffer from the very fundamental problem that the key ...