Why Markets Fail? The Economics of Covid-19 - College of Social ...
Why Markets Fail? The Economics of Covid-19
Part 1: Markets and Market Failures
Jim Dana
Northeastern University
Markets are Efficient
Markets work well in many settings. 1. Costs are minimized 2. Consumers pay only the economic costs of the goods they buy 3. Producers or firms are adequately compensated for capital investments and risks 4. The allocation of goods is efficient, or Pareto optimal
When economists say that a market works well, or is efficient, they mean that it results in a Pareto optimal allocation: there is no way to make everyone better off by altering the decisions that markets make.
But clearly markets do not always work well. For example, many workers are unemployed in a recession.
Markets Maximize Surplus Created
Another way to describe economic efficiency is maximizing the gains from trade. The consumers' gains, or Consumer Surplus, is the difference in the value or willingness to pay and the price paid. The sellers' gains, or Producer Surplus, is the difference between the price and their economic costs.
C.S. P
P.S.
S D Q
Market Failures
When don't markets work? A market failure is a reason that markets may not be efficient.
1. Market Power - industries aren't competitive 2. Asymmetric Information - quality or effort may be hard to
observe 3. Externalities - bystanders can be affected by decisions 4. Public Goods - even those who don't pay can consume 5. Market Frictions - markets aren't free 6. Uncertainty - uncertainty is costly; asymmetric nformation
and market frictions interfere with private insurance.
What about Inequality?
In addition to market failures, maximizing surplus may not be the only objective. Inequality is not a market failure as we define it. But inequality can lead to political unrest and uncertainty, which are inefficient. And if equality is something we all value (are willing to pay for), then increasing equality can be efficient.
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