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The organic composition of capital (OCC) is a concept created by Karl Marx in his critique of political economy and used in Marxian economics as a theoretical alternative to neo-classical concepts of factors of production, production functions, capital productivity and capital-output ratios. It is normally defined as the ratio of constant capital (capital invested in plant, equipment and materials) to variable capital (sum total of wages). The concept does not apply to all capital assets, only to capital invested in production (i.e. production capital). The neoclassical concept most similar to the increasing organic composition of capital is capital deepening.
Marx first referred to the idea in 1847 and discussed it in detail in Capital Vol. 1, chapter 25 ("The General law of Capitalist Accumulation"). In Capital Vol. 3 Marx demonstrates that the organic composition of capital decisively influences industrial profitability.
According to Marx, the OCC expresses the specific form which the capitalist mode of production gives to the relationship between means of production and labor power, determining the productivity of labor and the creation of a surplus product. This relationship has both technical and social aspects, reflecting the fact that simultaneously consumable use values and commercial exchange-values are being produced.
Marx calls this capital composition "organic", because it refers to the relationship between "living" and "dead" (or inert) elements in a capital investment. The "living element" is employed labour actively at work. The "dead" parts are the tools, materials and equipment worked with, which are the results of past labour (sometimes referred to as "dead labour").
Marx argues that a rising organic composition of capital is a necessary effect of capital accumulation and competition in the sphere of production, at least in the long term. This means that the share of constant capital in the total capital outlay increases, and that labor input per product unit declines.
The concept is introduced in chapter 25 of Capital, where Marx writes:
In this chapter we consider the influence of the growth of capital on the lot of the labouring class. The most important factor in this inquiry is the composition of capital and the changes it undergoes in the course of the process of accumulation. The composition of capital is to be understood in a two-fold sense. On the side of value, it is determined by the proportion in which it is divided into constant capital or value of the means of production, and variable capital or value of labour-power, the sum total of wages. On the side of material, as it functions in the process of production, all capital is divided into means of production and living labour-power. This latter composition is determined by the relation between the mass of the means of production employed, on the one hand, and the mass of labour necessary for their employment on the other. I call the former the value-composition, the latter the technical composition of capital. Between the two there is a strict correlation. To express this, I call the value-composition of capital, in so far as it is determined by its technical composition and mirrors the changes of the latter, the organic composition of capital.
In his discussion, Marx leaves out of account components of capital other than labour-power and means of production invested in, such as the faux frais of production (incidental expenses).
The full importance of the OCC emerges in chapter 8 of the third volume of Das Kapital.
The value composition of capital (VCC) is usually expressed as a ratio of constant capital to variable capital, or . Other measures are also used in the Marxian literature. One is . This is the ratio of constant capital to newly produced value (roughly, what modern economists call "value added"), i.e., surplus-value + variable capital and close to the concept of a capital/output ratio. Less common is the measure used by Paul M. Sweezy, i.e., , the ratio of constant capital to the total capital invested.
The total capital tied up by a capitalist enterprise includes more than fixed assets, materials and wages/salaries; it also includes liquid funds, reserves and other financial assets. For instance, an employer must normally reserve funds to pay for ongoing operating expenses, until these are recouped from product sales.
An empirical proxy measure for the technical composition of capital (TCC) is the average amount of fixed equipment and materials used per worker (capital intensity), or the ratio of the average amount of equipment & materials used to the total hours worked. The value composition of capital (VCC) is usually measured by summing the value of fixed capital ("Cf") and intermediate expenditures (circulating capital or "Cc") and dividing the total by the value of labour costs (V). The estimation procedure is not simple, for example because compensation of employees includes more than wages and part of the tax levy constitutes an element of surplus value.
In modern national accounts, an empirical proxy of the flow of variable capital is the wage-payments associated with productive activity in an accounting period, and a proxy for constant capital (flow measure) is depreciation charges + intermediate consumption; a stock measure of constant capital would be the fixed capital stock plus the average value of inventories held during the period of account (usually a year). However, because the "circulating" component of constant capital (denoted "Cc") includes purchases of external services and other operating costs, the stock of Cc is sometimes measured as the flow of intermediate consumption divided by the average inventory level.
The variable capital actually tied up by an enterprise at any point in time will usually be less than the annual flow value, because wages can in part be paid out of revenues received from ongoing product sales. Thus, the capital reserves held by an enterprise for paying wages may, at any time, be only 1/10 or so of their annual flow value.
The most accurate quantitative estimates for the OCC refer to the outlays in specific sectors, e.g. manufacturing.
By any of these measures, the plant- and machinery-intensive oil industry would have a high organic composition of capital, while labor-intensive businesses such as catering would tend to have a low OCC. The OCC varies according to differences in production technology, between sectors of an economy, or according to changes in production technology over time.
The OCC and crises
The magnitude of the OCC is important in Marxist crisis theory because of its impact on the average rate of profit. The implication of a rise in the organic composition of capital is a declining rate of profit; for every new increase in surplus-value realised as profit from sales, an even larger corresponding increase in constant capital investment becomes necessary.
But this represents only a tendency, Marx argues, because the fall of the rate of profit can be offset by counteracting influences. The main ones include:
- buying constant capital inputs at a lower cost.
- an increase in the rate of exploitation and productivity of labour power (including the intensity of work).
- a reduction of the turnover-time of constant capital inputs.
- the reduction of salaries and labour costs paid.
- a pool of abundant cheap labor, at home or abroad.
- foreign trade which reduces constant capital-input costs.
- technological innovations which reduce constant capital-input costs.
- the specific distribution of surplus-value as profit, interest, rent, taxes and fees, and the division between distributed and undistributed components of the new value added.
- market expansion (more sales, in less time).
- monopolistic or oligopolistic pricing of outputs, or in some way artificially raising output prices.
- reduction of the tax burden
- criminal methods to reduce costs and increase sales and profits
Because numerous different factors can affect profitability, the overall effects of a rising OCC on average industrial profitability therefore really have to be evaluated empirically in a longer time-span, e.g. 20–25 years.
Insofar as the trajectory of capitalist development is, as Marx argues, ruled by the quest for extra surplus-value, the economic fate of the system can be summarised as an interaction between the tendency of the profit rate to decline, and the factors that counteract it: in other words, the permanent battle to reduce costs, increase sales and increase profits.
The hypothetical final result of the rising OCC would be full automation of the production process, in which case labour-costs would be near-zero. This is argued to herald the end of capitalism's functioning as both a profit generating economic system for capitalists, and as a social system, among other things because the capitalist system does not contain a means for distributing incomes other than that based on labour-effort, and full automation would negate the concept of exploitation. However, it is also possible that automation of material production displaces labour into the services sector. Provided sufficient income exists to purchase services, a service economy can grow.
Marx and Ricardo
The different organic compositions of capital of different branches of industry raised a problem for the classical economic schema of David Ricardo and others, who could not reconcile their labor-cost theory of price with the existence of differences in the OCC between sectors. The latter imply different profit rates in different industries. Also, while market competition would establish a ruling price level for a type of output, different enterprises would use more or less labour to produce it. For these reasons, values produced and prices realised by different producers would quantitatively diverge.
Marx either solved this problem with his theory of prices of production and the tendency for profitability differentials to be levelled out through competition, or he failed to solve it, according to which side of the debate over the transformation problem one finds convincing.
Others see this "problem" (the development of a mathematical relationship between prices and labor-values) as a false one, rejecting the idea that Marx aimed to use his labor theory value to understand relative prices. Here the argument is that he aimed to reveal only the social nature or "deep structure" of capitalist society.
In a third interpretation, Marx aspired both to relate values and prices, and offer a social critique, because both of these were necessary to make his case truly convincing. Here, the separate concepts of product-values and product-prices are regarded as essential for a theory of market dynamics and capitalist competition; it is argued that price behaviour in aggregate cannot be understood or theorised about at all without reference to value-relations, explicitly or implicitly.
There has been a lengthy theoretical and statistical dispute among Marxian economists about whether the organic composition of capital really does tend to, or has to rise historically, as Marx predicted, or, to put it differently, whether in aggregate technological progress has a "labor-saving bias", and causes the average profit rate to decline.
One sort of question asked is, why capitalists would introduce new technology, if doing so would result specifically in a lower profit rate on capital invested? Marx's reply is essentially that:
- when a successful new technology or product is first introduced on the market, the pioneering producers typically obtain an additional profit (or superprofit), but when the use of the innovation spreads and is more generally applied, profitability declines for all producers.
- competition between capitalists forces the introduction of new technologies, whether they like it or not, since the productivity gains of competitors threaten to put them out of business, or reduce their market-shares.
- while average profit rates on capital invested may decline as a result, profit margins (or profit volumes) will increase, because more output can be produced and sold in a given accounting period, using the new technologies (implying unit-costs for products made will decline).
The statistical and historical evidence about the Kondratiev waves of capitalist development from the 1830s onwards is certainly favourable to Marx's theory of the rising organic composition of capital.[dubious ] It is difficult to find industries where the secular historical trend is one of an increase in the share of wages in the total capital outlay. Generally, the opposite is the case.
However, it has been argued that the value of physical capital is notoriously difficult to measure empirically in an accurate way; and statistical time-series for economic variables over long periods are also susceptible to errors and distortions. The owners of a business may not even know exactly what the physical assets they use are currently worth, or what their business is currently worth, as a going concern. That worth is hypothetical until such time as the business is sold and paid for. However, the modern trend in official accounting standards is certainly for assets to be valued more and more at their current market value, or current replacement cost, rather than at historic (original acquisition) cost.
In addition, during severe economic slumps, physical capital assets are subject to devaluation, lie idle or are destroyed, while workers become unemployed; the empirical effect is to reduce the organic composition of capital. Likewise, non-profitable war production can also lower the average OCC.
Finally, a technological revolution can also radically change the proportions between constant and variable capital, reducing the cost of constant capital, and lowering the OCC. In that case, operating costs are reduced in a short span of time, or cheaper alternatives substitute for the inputs traditionally used.
Much less discussed in the economic literature is the effect on the organic composition of capital of the growth of the services sector in the developed countries. For example, does the widespread use of computers in labour-intensive services lower the OCC?
Karl Marx, "The General Law of Capitalist Accumulation". 
- Anwar Shaikh, "Organic Composition of Capital" 
- Anwar Shaikh and Ahmet Tonak, Measuring the Wealth of Nations. Cambridge University Press.
- Angelo Reati, "The Rate of Profit and the Organic Composition of Capital in the Post-1945 Long Wave: The Case of British Industry from 1959 to 1981". Review [of the Fernand Braudel Centre], Volume IX, Number 4, Spring 1986.
- Ramin Ramtin: Capitalism and Automation – Revolution in Technology and Capitalist Breakdown. Pluto Press, London, Concord Mass. 1991.
- Angelo Reati, "The Rate of Profit and the Organic Composition of Capital in West German Industry from 1960 to 1981", Review of Radical Political Economics; 18(1/2), Spring/Summer 1986, pages 56–86.
- Christian Girschner, Die Dienstleistungsgesellschaft. Zur Kritik einer fixen Idee. Kőln: PapyRossa Verlag, 2003.