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WELCOME TO ALL
CONTRACT THEORY
Prepared by:
Mr. Avinash
Ms. Rashmi
Department. Of Agril. Economics, CSKHPKV PALAMPUR
10-11-2016
Contract Theory :
合同理論是在某些數值效用結構下
代表決策者的行為????
What is contract ?
• A contract is a voluntary arrangement between two
or more parties that is enforceable at law as a
binding legal agreement.
• Contract is a branch of the law of obligations in
jurisdictions of the civil law tradition.
• As Hart said ,
"Contracts are just an incredibly
powerful way of thinking about
parts of economics. ... Both sides
have an incentive to construct the
transaction [so that] it generates
the greatest value."
Contract theory
•contract theory studies how economic actors can and do construct
contractual arrangements, generally in the presence of asymmetric
information.
• In the field of economics, the first formal treatment of this topic was
given by Kenneth Arrow in the 1960s.
Kenneth Arrow
• Kenneth Joseph "Ken"
Arrow (born August 23,
1921) is an American
economist, writer, and
political theorist. He is
the joint winner of
the Nobel Memorial Prize
in Economics with John
Hicks in 1972. To date, he
is the youngest person to
have received this award,
at 51.
• A standard practice in the microeconomics of contract
theory is to represent the behavior of a decision maker
under certain numerical utility structures, and then apply
an optimization algorithm to identify optimal decisions.
• The spirit of these models lies in finding theoretical ways
to motivate agents to take appropriate actions.
Contract theoryContract theory
Main models of agency problems
Moral hazard
In moral hazard models, the information
asymmetry is the principal's inability to observe
and/or verify the agent's action. Performance-
based contracts that depend on observable and
verifiable output can often be employed to
create incentives for the agent to act in the
principal's interest.
Adverse selection
In adverse selection models, the principal is not informed about a certain
characteristic of the agent at the time the contract is written. The characteristic
is called the agent's "type".
For example, health insurance is more likely to be purchased by people who are
more likely to get sick. In this case, the agent's type is his or her health status,
which is privately known by the agent.
Another prominent example is public procurement contracting: The government
agency (the principal) does not know the private firm's cost. In this case, the
private firm is the agent and the agent's type is the cost level.
Incomplete contracts
Contract theory also utilizes the notion of a complete contract,
which is thought of as a contract that specifies the legal
consequences of every possible state of the world.
More recent developments known as the theory of incomplete
contracts, pioneered by Oliver Hart and his coauthors, study the
incentive effects of parties' inability to write complete contingent
contracts, e.g. concerning relationship-specific investments
Implications for the real world
Contract theory identifies a variety of obstacles to
cooperation and suggests which contracts are best
suited to overcome them.
It offers explanations for contracts that are commonly
written and for finding suitable contractual solutions
to new problems.
Applying contract theory to property rights helps
us understand the costs and benefits of
privatisation and public versus private ownership.
Perhaps the greatest application of the subject is
in corporate finance where contracts are designed
in a manner to ensure that entrepreneurs and
managers act in the interests of investors.
Understanding contracts does not only have
implications in the financial domain for understanding
bankruptcy reforms and investor rights, but has wider
implications for governance.
In a typical employment transaction, the employer
offers a wage and the employee agrees to accept the
employer's directions in return.
Conclusion….
Contract theory provides us with a general means of understanding
contract design.
One of the theory’s goals is to explain why contracts have various forms
and designs.
Another goal is to help us work out how to draw up better contracts,
thereby shaping better institutions in society.
Should providers of public services, such as schools, hospitals, or prisons,
be publicly or privately owned?
Should teachers, healthcare workers, and prison guards be paid fixed
salaries or should their pay be performance-based?
To what extent should managers be paid through bonus
programmes or stock options?
Contract theory does not necessarily provide definitive
or unique answers to these questions. However, the
power of the theory is that it enables us to think clearly
about the issues involved and help us understand the
potential pitfalls when designing new contracts.
The theory determines how a worker-employer
or customer-company contract can best be
mutually beneficial, avoiding conflicts and
negative consequences.
Through their initial contributions, Hart and
Holmstrom launched contract theory as a fertile
field of basic research.
The Royal Swedish Academy said.
"Over the last few decades, they have also explored many of its
applications. Their analysis of optimal contractual
arrangements lays an intellectual foundation for designing
policies and institutions in many areas, from bankruptcy
legislation to political constitutions."
Contract theory

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Contract theory

  • 1. WELCOME TO ALL CONTRACT THEORY Prepared by: Mr. Avinash Ms. Rashmi Department. Of Agril. Economics, CSKHPKV PALAMPUR 10-11-2016
  • 2.
  • 5. • A contract is a voluntary arrangement between two or more parties that is enforceable at law as a binding legal agreement. • Contract is a branch of the law of obligations in jurisdictions of the civil law tradition.
  • 6. • As Hart said , "Contracts are just an incredibly powerful way of thinking about parts of economics. ... Both sides have an incentive to construct the transaction [so that] it generates the greatest value."
  • 7. Contract theory •contract theory studies how economic actors can and do construct contractual arrangements, generally in the presence of asymmetric information. • In the field of economics, the first formal treatment of this topic was given by Kenneth Arrow in the 1960s.
  • 8. Kenneth Arrow • Kenneth Joseph "Ken" Arrow (born August 23, 1921) is an American economist, writer, and political theorist. He is the joint winner of the Nobel Memorial Prize in Economics with John Hicks in 1972. To date, he is the youngest person to have received this award, at 51.
  • 9. • A standard practice in the microeconomics of contract theory is to represent the behavior of a decision maker under certain numerical utility structures, and then apply an optimization algorithm to identify optimal decisions. • The spirit of these models lies in finding theoretical ways to motivate agents to take appropriate actions. Contract theoryContract theory
  • 10. Main models of agency problems Moral hazard In moral hazard models, the information asymmetry is the principal's inability to observe and/or verify the agent's action. Performance- based contracts that depend on observable and verifiable output can often be employed to create incentives for the agent to act in the principal's interest.
  • 11. Adverse selection In adverse selection models, the principal is not informed about a certain characteristic of the agent at the time the contract is written. The characteristic is called the agent's "type". For example, health insurance is more likely to be purchased by people who are more likely to get sick. In this case, the agent's type is his or her health status, which is privately known by the agent. Another prominent example is public procurement contracting: The government agency (the principal) does not know the private firm's cost. In this case, the private firm is the agent and the agent's type is the cost level.
  • 12. Incomplete contracts Contract theory also utilizes the notion of a complete contract, which is thought of as a contract that specifies the legal consequences of every possible state of the world. More recent developments known as the theory of incomplete contracts, pioneered by Oliver Hart and his coauthors, study the incentive effects of parties' inability to write complete contingent contracts, e.g. concerning relationship-specific investments
  • 13. Implications for the real world Contract theory identifies a variety of obstacles to cooperation and suggests which contracts are best suited to overcome them. It offers explanations for contracts that are commonly written and for finding suitable contractual solutions to new problems.
  • 14. Applying contract theory to property rights helps us understand the costs and benefits of privatisation and public versus private ownership. Perhaps the greatest application of the subject is in corporate finance where contracts are designed in a manner to ensure that entrepreneurs and managers act in the interests of investors.
  • 15. Understanding contracts does not only have implications in the financial domain for understanding bankruptcy reforms and investor rights, but has wider implications for governance. In a typical employment transaction, the employer offers a wage and the employee agrees to accept the employer's directions in return.
  • 16. Conclusion…. Contract theory provides us with a general means of understanding contract design. One of the theory’s goals is to explain why contracts have various forms and designs. Another goal is to help us work out how to draw up better contracts, thereby shaping better institutions in society. Should providers of public services, such as schools, hospitals, or prisons, be publicly or privately owned? Should teachers, healthcare workers, and prison guards be paid fixed salaries or should their pay be performance-based?
  • 17. To what extent should managers be paid through bonus programmes or stock options? Contract theory does not necessarily provide definitive or unique answers to these questions. However, the power of the theory is that it enables us to think clearly about the issues involved and help us understand the potential pitfalls when designing new contracts.
  • 18. The theory determines how a worker-employer or customer-company contract can best be mutually beneficial, avoiding conflicts and negative consequences. Through their initial contributions, Hart and Holmstrom launched contract theory as a fertile field of basic research.
  • 19. The Royal Swedish Academy said. "Over the last few decades, they have also explored many of its applications. Their analysis of optimal contractual arrangements lays an intellectual foundation for designing policies and institutions in many areas, from bankruptcy legislation to political constitutions."