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Unequal exchange is a much disputed concept which is used primarily in Marxist economics, but also in ecological economics, to denote forms of exploitation hidden in or underwriting trade. Originating, in the wake of the debate on the Singer-Prebisch thesis, as an explanation of the falling terms of trade for underdeveloped countries, the concept was coined in 1962 by the Greco-French economist Arghiri Emmanuel to denote an exchange taking place where the rate of profit has been internationally equalised, but wage-levels (or those of any other factor of production) have not. It has since acquired a variety of meanings, often linked to other or older traditions which perhaps then raise claims to priority. In the works of Paul Baran, and subsequently adopted in the dependency approach of Andre Gunder Frank, there is a related but distinct concern with the transfer of values due to superprofits. This did not refer to the terms of trade, but to the transfer taking place within multinational corporations (called "monopolies"). Versions of unequal exchange originating within the dependency tradition are commonly based on some such concern with monopoly and center-periphery trade in general. Here, if unequal exchange occurs in trading, the effect is, that producers, investors and consumers incur either higher costs or lower incomes (or both) in the buying and selling of commodities than they would have, if the commodities had traded at their “real” or "true" value. In that case, they are disadvantaged in trading, and their market position is worsened, rather than strengthened. On the other side, the beneficiaries of the trade obtain a superprofit. This term implies that the beneficiaries of unequal exchange are capitalists or entrepreneurs, whereas as understood by Emmanuel the beneficiaries are the high-wage country consumers or workers. The most renowned of those adopting the term is Samir Amin, who tried to link it to his own argument on the interdependent uneven development of rich and poor countries. Ernest Mandel also adopted the term, although his theory was based rather on that of the East-German Marxist Gunther Kohlmey. The most common approach within Marxism is to talk about unequal exchange whenever unequal labour values are being exchanged (e.g., John Roemer), and this type of approach has then been elaborated in recent decades by ecological economists, based instead on, e.g. ecological footprints or energy. Depending on definition, the historical occurrence of unequal exchange can be traced to anything from the origins of trade itself, not limited to the capitalist mode of production, to the origins of significant international wage-differentials, or to the post-war appearance of a significant net-inflow of raw-materials to the developed countries. In the approach of Immanuel Wallerstein the origins of the modern world-system, or what others, such as Ernest Mandel, would call the rise of merchant capitalism, is said to have entailed unequal exchange, although the idea was criticised by Robert Brenner. Another aspect of these theories is the criticism of fundamental assumptions of Ricardian and neoclassical theories of comparative advantage, which could be taken to imply that international trade would have the effect of ''equalising'' the economic position of the trading partners. More generally, the concept was a criticism of the idea that the operation of markets would have egalitarian effects, rather than accentuating the market position of the strong and disadvantaging the weak. == Basic definition == The basic principle of unequal exchange can be described simply as "buying cheap and selling dear", in such a way that a commodity or asset is bought either: * Below its real value, and sold at a higher value, or * At its real value, but sold above its real value, or * Above its real value, and sold at a price even higher than its already inflated acquisition cost (e.g., stock market). This practice was already known and described in medieval times and earlier, and it led to theories of a “just” or “fair” price for products. For example, according to medieval Christian theologians, the profit mark-up should never be more than one-sixth (16-17%) of the value of the traded object (see Paul Bairoch, Victoires et deboires, Vol. 3, Gallimard 1997, p. 699). The idea of unequal exchange surfaces again nowadays in controversies over fair trade. However, in modern neoclassical economics, the notion of a morally justifiable price is regarded as unscientific; at most one can talk about an “equilibrium price” in an open, competitive market. If the value of a good is simply equal to the price someone is prepared to pay for it according to individual choice, no exchange can be unequal. Anyone can claim to have been "cheated" or shortchanged in exchange, in the sense of receiving an "unfair" price for a commodity, less than it is really worth, or having to pay more than it is really worth. The crucial question which must be answered therefore is what the "real value" of commodities actually is, what their real worth is, and how that could be objectively established. A related question is why the "victim" traded at a lower price, when he could have gotten a higher price elsewhere. This question preoccupied social philosophers and economic thinkers for many centuries. It contributed to the "moral science" of political economy, which was originally concerned with the problem of what would be a fair and just exchange, and how trading could be regulated in the interests of a more harmonious progress of human society. In modern thought, however, value in economics is regarded as a purely subjective matter — it can be judged only on the basis of how an individual actually lives his life and how he conducts himself as an individual in the marketplace. The only “objective” aspect that remains is the price at which a commodity sells or is purchased, and this becomes the foundation for modern economic science. So in modern economics, value is essentially a question of style, moral behaviour and the spirituality of individuals, not an economic issue. If unfair trading practices occur, it must be that there is an impediment to freely competitive markets; and if those markets or market access could be open, all would be fair. Fair competition is said to be guaranteed through: * Free access for all to the market place, and * A legal and security framework which protects traders from being cheated and robbed. In that case, the concept of "unequal exchange" can only refer to unfair trading practices, such as: * Not getting an equal opportunity of access to the market, * Illegal trading practices, ranging from plunder, robbery and theft, to extortion or price mark-ups which are against the law. By implication, unequal exchange is not itself viewed here as an economic process, because if open market access and market security exist, then trade is equal and fair by definition - it is equal because everybody has the same access to the market, and it is fair because just laws and their enforcement ensure that this is so. Another way of saying this is that if citizens have equal rights and equal opportunity, there cannot be any unequal exchange, except if citizens behave in immoral ways. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Unequal exchange」の詳細全文を読む スポンサード リンク
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