Investopedia: The Difference Between Finance And Economics

Although they are often taught and presented as very separate disciplines, economics and finance are interrelated and inform and influence each other. Investors care about these studies because they also influence the markets to a great degree. Here we take a look at finance and economics, what they can teach investors and how they differ. (For background reading, see Is finance an art or a science?)

ECONOMICS 
What is it?
Without falling back on dry academic definitions, economics is a social science that studies the production, consumption and distribution of goods and services, with an aim of explaining how economies work and how their agents interact. Although labeled a “social science” and often treated as one of the liberal arts, modern economics is in fact often very quantitative and heavily math-oriented in practice.

How is economics useful?
When economists succeed in their aims to understand how consumers and producers react to changing conditions, economics can provide powerful guidance and influence to policy-making at the national level. Said differently, there are very real consequences to how a nation approaches taxation, regulation, and government spending; economics can offer advice and analysis regarding these decisions.

To read the full piece, please go here:
http://www.investopedia.com/articles/economics/11/difference-between-finance-and-economics.asp