Say's law
It states that there can be no demand without supply.

Seigniorage
The difference between the value and the cost of production of money in an economy.

Severance tax
A form of tax levied on the value of raw materials used for production of goods and services.

Solvency
The condition of a business when it is able to meet all it's long term fixed costs and expenses.

Spatial differentiation
A situation where the resources, production and consumption is not evenly distributed in the economy but concentrated in some areas by virtue of human activity or natural causes

Special Drawing Rights
It is the monetary reserve currency of the International Monetary Fund (IMF), with which the member nations hold accounts to settle any balance of payment deficits.

switching point
A point in time or a price, when an economy substitutes the use of one natural resource to another.

SWOT
A model for analyzing the Opportunities and Threats in the business environment and the organization's Strengths and Weaknesses. SWOT - Strenghts, Weaknesses, Opportunities and Threats.