However, most criminals do not have sufficient resources to pay such multiplied fines, so detention or other forms of non-material punishment must be applied. One legal and economic implication is that a fine should be used as punishment if the bad guy can pay. The reason for this is that fines are transfers and do not cause deadweight (i.e. losses for some that are not profits for others); Incarceration, on the other hand, transfers virtually no wealth to the criminal, but causes two forms of deadweight: the loss of the criminal`s earning capacity in legitimate employment in the outside world, and the cost to taxpayers of providing a prison and guards. But because so few criminals have enough assets to pay multiplied fines, private execution would not be profitable for private law enforcement, and so the state ensures enforcement. In some circumstances, imprisonment fulfills the additional function of depriving potential wrongdoers of their rights. As used by jurists and jurists, the term «law and economics» refers to the application of microeconomic analysis to legal problems. Because of the overlaps between legal and political systems, some of the questions of law and economics are also raised in political economy, constitutional economy, and political science. A common concept of efficiency used by law and economists is Pareto efficiency. Legal regulation is effective in the Pareto sense if it cannot be changed so that one person is better off without another person being worse off.

A weaker concept of efficiency is the effectiveness of Kaldor-Hicks. A legal rule is that Kaldor-Hicks is effective if it could make Pareto effective by asking some parties to compensate others for their loss. Law and economics are closely related to jurimetrics, the application of probability and statistics to legal issues. The second characteristic of law and economics is its emphasis on incentives and people`s reactions to those incentives. Thus, compensation in accident law (tort) does not serve to compensate injured parties, but rather to encourage potential injured parties to take effective (cost-justified) precautions to avoid the accident. Law and economics share with other branches of economics the assumption that individuals are rational and respond to incentives. If penalties for an act increase, people will take fewer actions. Law and economics are more likely to use empirical or statistical methods than other branches of legal analysis to measure these responses to incentives.

The economic analysis of law has had an influence both in the United States and elsewhere. Legal advice uses economic analysis and theories of law and economics with some regularity, in the United States, but increasingly also in Commonwealth countries and Europe. The influence of law and economics is also felt in legal education, with graduate programmes in this field offered in a number of countries. The influence of law and economics in civil law countries can be seen in the availability of law and economics textbooks in English and other European languages (Schäfer and Ott 2004; Mackaay, 2013). An important conclusion of law and economics is that property rights in market economies are effectively defined in many circumstances. The characteristics of effective property rights are universality (everything is owned), exclusivity (everything belongs to an agent) and transferability. Law and economics can also explain the consequences of ineffective definitions of ownership. For example, because no one owns wild fish, the only way to own a fish is to catch it. The result is overfishing (see Tragedy of the Commons).

Intellectual property is an important area of current research, as new reproductive technologies have a profound impact on the definition of this form of property rights and on the incentives to create such property rights. Nevertheless, the possibility of a clear distinction between positive and normative analysis has been questioned by Guido Calabresi, who, in his book on «The Future of Law and Economics» (2016: 21-22), believes that there is a «real – and inevitable – existence of value judgments underlying many economic analyses». [17] I would like to invite you to submit a contribution to a special issue prepared by Laws. an open access journal published by MDPI. The special issue is entitled «Legal and economic issues of the digital and collaborative economy». The historical precursors of law and economics can be traced back to the classical economists, to whom the foundations of modern economic thought are attributed. As early as the 18th century, Adam Smith discussed the economic impact of mercantilist legislation; David Ricardo later opposed British corn laws on the grounds that they hindered agricultural productivity; and Frédéric Bastiat examined the unintended consequences of legislation in his influential book The Law. However, the application of economics to the analysis of the law governing non-market activities is relatively new. A European legal and economic movement around 1900 had no lasting influence.

[3] «Law and economics,» also known as the economic analysis of law, differs from other forms of legal analysis in two main ways. First, theoretical analysis focuses on effectiveness. Simply put, a legal situation is said to be effective when a right is granted to the party who would be willing to pay most for it. There are two different theories of legal effectiveness, and lawyers and economists support arguments based on both. The positive theory of legal effectiveness asserts that the common law (judicial law, the most important body of law in England and its former colonies, including the United States) is effective, while normative theory asserts that the law should be effective. It is important that the two theories remain separate. Most economists accept both. Approaches to the same topics from the Marxist and critical point of view of the Frankfurt/theory theory do not generally identify as «law and economics».