As in, the organic composition of capital. Is it valid or not? According to Marx the OCC represents the "strict" correlation between the movements of the technical composition of capital (TCC) and the value composition of capital (VCC). This correlation is posited in vol 1:
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. Wherever I refer to the composition of capital, without further qualification, its organic composition is always understood.
But the reasons why the TCC and VCC are strictly correlated are not given in vol 1. At least AFAICS. The validity of this correlation is in question for me.
By that, I don't mean that I can't see the logic of a secular tendency for the TCC to rise. As productivity increases, the amount of raw materials consumed in the production of material goods and deliverance of services, in order to employ a given amount of labour, must necessarily increase. That's not a full worked out demonstration, but I don't think it would be too difficult to create a fairly waterproof demonstration that the dynamics of capitalism mean that it is powerless to do anything other than increase the TCC over time. It should be noted, that from the perspective of long term crises, specifically the environmental one, that is an insoluable problem, in itself.
However, the proposition that a secular increase in the TCC necessarily creates a "strictly correlated" increase in the VCC, has no immediately obvious foundation. There are a number of counter-indications, at first sight.
Secular trends should be visible on historical scales. A secular increase in the value-composition of capital means that the amount of SNLT in the constant capital (fixed and circulating) is ever greater, compared to the available living labour power. Two immediately apparent contra-indications spring to mind.
Over time, England, Germany, the USA, Russia, and now Brazil, India and - last but never least - China, have made the transition from pre-industrial to state-of-the-art, cutting edge industrial power. If the VCC associated with fixed (and circulating constant) capital was increasing over time, then it should take each country more and more years to effect this transition. In historical fact, the opposite is the case. Germany industrialised quicker than England, the USA quicker than Germany. And today China has effected the transition in a staggeringly short period.
Secondly, if the VCC is increasing over time, we may expect, either the composition of the proletariat to have shifted to where most of the workforce is engaged in producing means of production goods (questionable argument), or, the share of the wage bill in corporations current accounts, should have shrunk to a tiny proportion of total liabilities. This does not appear to be the case.
Neither of those contra-indications are necessarily conclusive, but they are, imo, suggestive enough to seriously question what, exactly, is the foundation for the OCC hypothesis - i.e. the correlation between TCC and VCC?
I could say more, but I'll leave it there for openers.
P.S. The only previous thread that I could find that really started to address the OCC was this one constant capital (badly hijacked - you can ignore everything except Cardinal Tourettes and mikus, and occasionally lem, as the rest of the thread is off-topic).
P.P.S. Also - a lot of ortho Marxists seem to have a programmed response that any mention of the OCC is really a discussion about the TRPF, which they then drone on about at length, ignoring the question of the OCC's validity. Such responses will be ignored as off-topic (by me, anyway).



Can comment on articles and discussions
I've always read this part:-
in the following way:-
productivity increases within a single firm/individual capital will clearly lead to an increase in the TCC
All other things being equal at this point in time there will be a direct correlation between the proportional increase in the TCC and VCC because at this stage all that is happening is that the change in VCC is expressing the change in TCC, in value terms. i.e. this change relates purely to the physical change in constant capital input items (the numerator in the equation) and if now more physical inputs are required relative to the same amount of labour then, the changed VCC (at this frozen point) is purely an expression of the TCC in value terms
So at this stage and considered abstractly/theoretically I can see how you can talk about a direct correlation between the two (and this is why Marx says he uses OCC to express the VCC, in so far as it is determined by its technical composition)
However, as the VCC of capital is expressed in value terms, in addition to it expressing the changes in TCC discussed above in relation to that individual firm/capital's productivity, it will also always reflect productivity changes outside of the firm/individual capital which will have an impact on both the numerator (value of constant capital) and the denominator (value of labour power)
So once these changes 'outwith' of the firm/individual capital are taken into account the correlation between the TCC and VCC is lost because the later contains & expresses things that are not contained or expressed in the former - i.e. it is possible (theoretically) for an individual capital to have an increasing TCC due to its own increased productivity while at the same time having a reducing VCC because productivity changes in wider capitalist society have made the value of those (increased) physical inputs/constant capital cheaper
So as Marx says in the quote - he uses OCC as a concept which expresses in value terms purely the changes in TCC for an individual firm/capital which excludes any changes to the VCC caused by productivity increases outwith of that individual firm/capital
Generally though Marx is very poor in getting across the distinctions between OCC and VCC (partly i think because OCC didn't even feature in volume 1 of capital until the third printing/edition of capital) - which leads a lot of people to use OCC & VCC interchangeably which was clearly not what Marx had in mind with them
I do think it's a useful distinction though as OCC indicates shifts in technology/productivity within an enterprise/capital that effects the VCC - so it identifies a particular source of the shift in VCC, i.e. an internal shift, one which individual capitals have more control over (i.e. their own production process, selection of technology etc..) and the dynamics of such a process can be understood, to an extent, independently of the changing values of inputs to the production rpocess. And this is in contrast to the overall shift in VCC which includes things that comes from outwith of the individual capital, i.e. that individual capital operates in a market environment where values of inputs are determined by proceses outwith their control - so in a way the different concepts are ways of identifying particular shifts/sources of change in composition of capital
this ends up in the situation where, as Marx says,
Sorry not sure if i've addressed your actual point or not
edit: also when you think about it, despite Marx's poorly worded explanation, if Marx really thought there was a hard definite and all the time applying correlation between the TCC and VCC there would be no need for him to introduce the concept of OCC at all. He introduces the OCC to distinguish the sources of shifts in VCC 'so far as it is determined by its technical composition' which logically implies he sees valid movements in the VCC which are not determined by the TCC (at the individual capital/firm/enterprise level), in which case he is saying there is not a direct, hard and all time applying correlation between TCC and VCC