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 UID223263 帖子255 主题108 注册时间2011-7-11 最后登录2013-8-18 
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2#
 
 发表于 2011-7-13 15:09 
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| Economic depreciation is the decrease in the value of an investment over a period. For example, assume that a person buys a calculator for $10 and after one year the value of the calculator falls to $9. This decrease in value ($1) is economic depreciation. 
 On the other hand, she could’ve invested these $10 somewhere else and earned interest (let’s say @ 20%). The increase in the value of her asset ($2) is referred to as the forgone interest and also forms part of the opportunity cost.
 
 By investing in the calculator, the company is worse off by $3.
 
 Implied rental rate = economic depreciation + interest forgone.
 
 P.S: Is forgone spelt foregone?
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