Economics and the 2008 crisis: a Keynesian view 
7.2 Microeconomics – what is a firm?
If we are to make sense of microeconomics, we have to examine the nature of one of the most important economic agents that make up the economy – what we refer to as 'firms'. This section introduces you to the economic concept of a firm.
OpenLearn - Economics and the 2008 crisis: a Keynesian view 
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