Contract theory is the text that deals with normative and conceptual issues in contract law. One of the most important questions in contract theory is why contracts are applied. An important answer to this question focuses on the economic benefits of implementing bargains. Another approach, associated with Charles Fried, asserts that the purpose of contract law is to impose promises. This theory was developed in the book Fried Contract as Promise. Other approaches to contract theory can be found in the writings of critical lawyers and lawyers. In colonial times, the concept of consideration was exported to many common law countries, [who?], but it is unknown in Scotland and in civil courts.  Systems based on Roman law do not ask for consideration and do not recognize them, and some commentators have suggested abandoning reflection and replacing it as the basis for contracts.  However, legislation, not judicial development, was seen as the only way to eliminate this entrenched doctrine. Lord Justice Denning said, “The doctrine of consideration is too strong to be toppled by a side wind.”  In the United States, the focus has been on the negotiation process, as illustrated by Hamer v. Sidway (1891). Finally, a modern concern that has increased in contract law is the increasing use of a particular type of contract called “contract contracts” or “formal contracts. This type of contract may be beneficial to some parties, due to the convenience and ability of the strong party in a case to force the terms of the contract to a weaker party.
For example, mortgage contracts, leases, online sales or notification contracts, etc. In some cases, the courts consider these membership contracts with particular scrutiny because of the possibility of unequal bargaining power, injustice and unacceptable. A term can be implied on the basis of habits or uses in a given market or context. In the Australian case Con-Stan Industries of Australia Pty Ltd v Norwich Winterthur (Aust) Limited, the terms of a concept to be included by Customs were established. For a term to be invoked by Customs, it must be “known and accepted to the extent that any person who makes a contract in that situation can reasonably be considered to have introduced that clause in the treaty.” :p maces 8-9 Many contracts contain a forum selection clause that defines cases where contract disputes need to be resolved.