In: Economics
In general to evaluate welfare effects we need to consider the welfare of groups of individuals. What problem does consumer surplus pose in this regard?
Consumer surplus is characterized as the distinction between the aggregate sum that buyers are eager and ready to pay for a good or administration and the aggregate sum that they really pay (for example the market cost). At the point when the interest for a good or administration is completely elastic, customer surplus is zero on the grounds that the value that individuals pay coordinates precisely what they are eager to pay.
Conversely, when the request is entirely inelastic, the surplus is infinite. In this circumstance, the request doesn't react to a value change. Whatever the value is, the amount requested continues as before.
Consumer surplus relies upon the Quantifiability of utility. Utility, most importantly, differs from individual to individual, from item to product. Since tastes and inclinations shift from individual to individual, one can't quantify surplus precisely.
For customary fundamental products, it is unimaginable to expect to quantify an abundance advantage since the purchaser may spend his whole pay as opposed to abandon it. Under the condition, Consumer surplus might be endless.
One even experiences issues in estimating surplus got from substitute products. At last, products having big talker offers may have a lower level of fulfillment or surplus when their costs fall.