Slow economic activity with prices low and many people out of work
is the main sign of

The answer would be Recession.

Explanation:

Slow Economic activity with prices low and many people out of work is the main sign of Recession.

Recession is the term used in Macroeconomics, which refers to the significant decline in the economic activity of a country. This recession can happen in a country, or countries or in the whole world. Almost all of the economic indicators show a fall. Main economic indicators that indicate the overall condition or situation of the economy may include, Gross Domestic Product GDP, Household Income, Business Profits, Investment Spending, etc. These indicators fall where as the other indicators like unemployment rate, unemployment claims, bankruptcies, etc rise.

So when the general economic activity slows down, and many people are out of the work, it is the indication of Recession in the economy.  

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