It is based on the assumption that economic phenomena and actors react and interact according to observable regularities. Furthermore, it is assumed that actors act atomistically, i. Lawson , 8. The operation of models consists of two steps: first, the logical consistency of a model is tested deductively. Then, the model is measured against the empirical reality. Note however that within the past few years, a pragmatic view on models became popular, in which empirical adequacy is the most important criterion rather than dogmatic coherence and mathematical aesthetic.
As explained in the preceding section, neoclassical economics builds mathematical formal models in order to describe economic relations. The latter are assumed to follow regularities which can be formalized in models. Often, the use of mathematical explanation is considered a strength when compared with other social sciences, since the findings of formalistic models seem to be more trustworthy than verbal analyses. Proponents argue that in contrast to verbal arguments, mathematical formulations are unambiguously defined and, in contrast to classical economics, cannot be interpreted arbitrarily Rodrik , Neoclassical economics mainly works in the deductive research tradition.
Based on axioms, hypotheses are derived from theoretical considerations. This does, however, not mean that hypotheses are not revised and linked to empirical findings. For instance, econometrics aims at further developing and improving models in order to ensure empirical adequacy. A central concept of economic analyses is the mathematical formulation and solution of optimization problems under constraints by means of static and dynamic optimization methods, such as the approaches developed by Lagrange, Kuhn and Tucker, or Hamilton.
Classically, with these methods, the utility maximization of individuals, which is subject to constraints, can be modelled. Also, environmental economists use this approach in order, for example, to calculate the optimal taxation of greenhouse gas emissions. Thereby, economic growth is described as the target function and emission limits as the constraint cf.
For instance, instead of taking economic development as an endogenous process in historical time, the causal relations of dependent variables are analysed by holding other factors constant. Even while some research does focus on dynamic modelling e. According to the neoclassical perspective, ethical questions are not an object of fundamental economic analyses but only come into play when explicitly normative issues are considered. For Quaas and Quaas , the increase of wealth is the primary goal of mainstream economics. This self-conception explains the neoclassical macroeconomic focus on economic growth as the target variable.
In this context, the categories, terms and relations as well as the heuristics are presented as value-free. Most neoclassical economists differentiate between facts and norms, where the latter are only an issue in explicitly normative fields of neoclassical economics such as welfare economics or economic policy, which provide guidance and analysis for binding, normative decisions. This conception of positive economics often identifies itself with the — misinterpreted and simplified — claim of Max Weber to ban value judgements from scientific analyses.
However, the assumptions of neoclassical economics do have a normative basis which results from the definition of its fundamental problem: the allocation of scarce resources.
Cartwright, Nancy. Cohen, Bernard I. Mark Blaug , goes even further by arguing that due to the formalistic revolution in the s, the in-part process-oriented analyses of comparative statics were replaced by the definition of an entirely static endpoint. Jevons, William S. Every rule attributes a predicate, a mode of action, a characteristic to a class of things; an analysis of the notion of the subject and predicate shows what is contained in the rule in question, to what purposes it applies, what cases come under it, what it can account for quoted in Guillebaud, , Evidence from his Correspondence.
Neoclassical economics assumes that humans have the goal to maximize their utility and that this maximization can be modelled. Since only individuals know their own preferences, the market is considered to be the best instrument to satisfy them.
State intervention is only considered to be economically reasonable in case of a market failure, while the perfect market is taken as the normal case and perfect competition as ideal state. Ideologically, neoclassical economics only discusses negative freedom, i. Negative freedom is argued to be best realized in a market system. These categorizations and terms imply a certain faith in markets which is why neoclassical economists are often associated with a market liberal worldview.
This is illustrated by the approach of environmental economics: this considers environmental damage as external effects that need to be made scarce and tradable on the market. A further criticism points out that neoclassical economics is biased towards specific normative aims in its questions and analyses: this can be seen in its treatment of the pursuit of personal benefit as the sole aim of entrepreneurial action; or in the application of the insights of behavioural economics as vehicle for profit maximization.
Generally speaking, the dynamic, New Keynesian DSGE models can be considered the current standard of macroeconomic analyses of economic growth and business cycles cf. Heer and Maussner Yet, macroeconomic research partially changed in particular since the financial crisis. Brunnermeier and Sanikov At the edges of neoclassical economics, new theoretical fields have emerged, such as behavioural economics and complexity economics, which soften and modify the traditional neoclassical assumptions such as the rationality of agents, perfect information or the isolation of actors.
While the use of mathematical tools increased despite broad critique within the past years, some points of critique were integrated into the analyses. Hence, neoclassical economics starts crumbling from the edges Quaas , In particular in macroeconomics, there is a variety of unconventional research projects which are however developed within the framework of standard neoclassical economics.
The basic system of axioms, terms and categories, i. A general trend is the already mentioned focus on empirical adequacy and, as a consequence, the increasing importance of econometrics. At the same time, an increasing interest of economists in other research objects more or less outside the economy can be observed. The application of the economic principle to the analysis and description of phenomena outside the economic field of analysis is commonly called economic imperialism cf.
Milonakis and Fine A large number of economic theories are related to neoclassical economics. It needs to be differentiated between theories that apply the neoclassical methodology to new fields e. This section aims to provide an overview of the most important sub-schools. Environmental and resource economics deals with problems and solutions concerning the environment and sustainable development from an economic perspective. Therefore, solutions aim at integrating the environment into the market by assigning a price to environmental impacts and at generating incentives that reduce the use of resources in the production process cf.
This can be realized by the relative or absolute decoupling of resource consumption or environmental damage and economic growth. The main premises underlying this approach are 1 the substitutability of natural resources and human capital 2 the solution of the problem of decreasing marginal returns and a therefore necessary 3 technological change Smulders , Bowen and Hepburn Game theory comprises several analyses and concepts that model the strategic interaction of several actors in interdependent situations i.
Game theoretic approaches are used in many social sciences and were first developed by John von Neumann , von Neumann and Morgenstern In a game, players are assigned certain payoffs depending on the strategy and the game. The analysis starts with the payoffs and subsequently goes back to the starting point. In some games e. This leads to a so-called Nash Equilibrium, which however does not have to be the best outcome in objective terms. A differentiation is drawn between zero-sum games, in which the gains of one actor are equal to the losses of the other actor, and non-zero-sum games, in which the sum of payoffs is not equal to zero.
ipdwew0030atl2.public.registeredsite.com/209840-how-do.php In economics, game theory can be applied to the interactions between firms e. Moreover, in behavioural economics, theories of acting rationally and utility-maximizing actors were tested using games such as the ultimatum game, the trust game or the dictator game. Experiments in which participants played these games provide evidence that humans consider fairness more important than monetary gain and thus falsify the concept of the strictly maximizing actor Weber and Dawes , 94— Information economics deals with the role of knowledge and information in economic contexts and thereby problematizes the assumption of perfect information.
In information economics, information is often presented as being asymmetrically distributed and as expensive to purchase or receive. Those informational asymmetries can lead to inefficiencies. The latter become apparent, for instance, in shrinking markets or in the disappearance of high-quality products, which compete with worse products, since the poor quality of the latter cannot be identified by consumers cf.
Akerlof Further questions and analyses in the field of information economics are risk aversions of banks in times of crisis, reputational effects, the role of intermediaries and brokers as well as the role of signals and publicity cf. New Institutional Economics NIE mainly deals with the role of transaction costs and the institutional structures that actors establish to regulate these.
Even if NIE assumes utility maximizing and individual actors, who structure and reduce uncertainty and transaction costs by building institutions, these assumptions do not necessarily imply an optimal resource allocation. Instead, suboptimal institutional structures are possible. These can emerge out of historical processes and represent the interests of a powerful group, which consequently receives higher rents cf. North Behavioural economics takes up the critique of the homo economicus and tries to conceptualize the economy as the interaction of individuals, who are conceived as actors with bounded rationality.
The research therefore focuses on the questions: which decisions do economic subjects make; and what motivations lead to their action. In capital market theories in particular, models and parameters of behavioural economics are currently used Behavioural finance. Neoclassical theory can be considered a paradigm since it is a more or less closed, extensive perspective which researches and interprets economic interactions Heine and Herr , 5. It can also be perceived as the economic perspective which was able to take over from classical economics and establish itself as today's mainstream.
Even if some core assumptions and ideas from classical economics were incorporated and modified, the current state of neoclassical economics can only partially be seen as a new edition of classical economics; hence, the name can be misleading. The difference between these paradigms starts with the definition of what is economic activity. While for neoclassical economics, the task of the economy is to allocate scarce resources, for classical economics guaranteeing survival and therefore the organization of work and reproduction are paramount.
Also, the marginalist approach in neoclassical theories on growth and distribution and the consequent understanding of capital differs from the surplus approach of Smith, Ricardo or later Marx. According to the latter, it is only labour that generates the surplus value of production in the process of accumulation.
This labour determines the value of goods see labour theory of value. Additionally, the concept of natural prices, which are determined by the production costs and which differ from the demand- and supply-dependent market price was not incorporated into neoclassical economics.
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