studying a biological ecosystem like a lake. One person who sets out to study the lake might focus on specific

topics: certain kinds of algae or plant life; the characteristics of particular fish or snails; or the trees

surrounding the lake. Another person might take an overall view and instead consider the lake's ecosystem

from top to bottom; what eats what, how the system stays in a rough balance, and what environmental stresses

affect this balance. Both approaches are useful, and both examine the same lake, but the viewpoints are

different. In a similar way, both microeconomics and macroeconomics study the same economy, but each has

a different viewpoint.

Whether you are scrutinizing lakes or economics, the micro and the macro insights should blend with each
other. In studying a lake, the micro insights about particular plants and animals help to understand the overall
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