IF you have 2 goods, that are perfect one to one substitutes, and the
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Perfect substitutes are those commodities that can be replaced perfectly in place of another.
Consumer surplus refers to the additional money and satisfaction that a consumer gets when what he pays for a commodity is lower than what he is willing to pay.
To understand what happens to consumer surplus when there is a price rise in one of the substitues.
We need to understand that when there is an increase in the price of a substitute good, a consumer will just shift to the consumption of the other commodity as it will give him the same level of satisfaction.
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