< Macroeconomics 
 
        
      Investment
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 Investment is the expenditure(E) on new capital equipment which will be used to produce final goods & services(g+s) in the future. It includes building construction, housing, etc.  | 
Factors Affecting Investment:
- The level of I is the most volatile component of AE, particularily because it is forward planning/focused.
 
Determinants
The level of investment in the economy is determined by:
 
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- Private sector investment comprises 10-20% of AE.
 
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