Advantages And Disadvantages Of Asymmetric Information

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Asymmetric Information – intro and difficulties
The term asymmetric information comes from a situation where one party involved in a transaction knows more information than the other. Information is unevenly distributed between parties in an economic relationship, for example one knows a material fact. It tends to be the seller who has that further information however it is not uncommon for it to also be vice versa. Obviously this can have its disadvantages because one party now has the ability to take advantage of the other.
There tend to be many problems linked to asymmetric information, however the main 2 are: Adverse Selection, this is where we see the use of asymmetric information and immoral behaviour before a transaction is complete (Ex ante information problem) – hidden information. For example a person who has not had optimal health may feel the need to take out a life insurance policy more than someone who is perfectly healthy. The second of the main problems is Moral Hazard, here asymmetric information is again used in an immoral way, but this time it is after the transaction has been complete (Ex post information problem) - hidden action. An example of this is someone who has taken out fire insurance may take greater fire risks or commit arson resulting in a pay out from the insurance company.
Game Theory is an approach to account for interdependence of agents decisions and can be prominent within Asymmetric Information. It is a method of analysing situations in which outcomes of your choices depend on others choices – there is mutual interdependence. When an insurance company decides to reduce or increase their prices, they are not sure how their customers / rivals will react. This leads them to making big decisions ...

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...acts can be designed to limit payouts or limit services covered to e.g. up to 3 days hospitalisation.
The RAND Health Insurance Experiment randomized families to insurance plans varying from none (free care) to 95% coinsurance deductible with an excess applied. The participants in the latter used 25 to 30% less services than those in the free plan, and were 23% less likely to be hospitalised. This reduced use of services was however found to be harmful for those who were poor and sick eg hypertension was less controlled.
Insurance companies may also enter into agreements with specific providers and the insured pay extra to use non preferred suppliers.
Efficient contracts ensure P & A maximise profit and risk sharing is optimised. Payoff is required so A is willing to participate and must include inducement for A to perform required tasks not opportunistic behaviour.

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