I quoted Marx on services as follows: "Thus, because the specific relation of labour and capital is not contained at all in this purchase of services; because it has either been completely extinguished or was never present, it is naturally the favourite form used by Say, Bastiat and their associates to express the relation of capital and labour."
As an aside, I think it is worth mentioning that Marx was thinking here mainly about personal services, and that he modified his idea somewhat when he prepared Capital Vol. 1 for publication. Thus, his analysis of the paid work process provided there provides a much more sophisticated analysis of the real subsumption of human work by capital, and subsequently, in discussing value-augmentation through production, Marx writes e.g. that "Capitalist production is not merely the production of commodities, it is essentially the production of surplus-value. The worker produces, not for himself, but for capital. It no longer suffices, therefore, that he should simply produce. He must produce a surplus-value. That worker is productive only, who produces surplus-value for the capitalist, and therefore works for the valorisation of capital. If we may take an example from outside the sphere of production of material objects, a schoolmaster is a productive worker when, in addition to belabouring the heads of his schholars, he works like a horse to enrich the school proprietor. That the latter has laid out his capital in a teaching factory, instead of in a sausage factory, does not change the relation. Hence the concept of productive work doesn't simply imply a relationship between work and useful effect (a service being defined as the useful effect of a use-value - JB), between the worker and the output of work, but also a specific, social relation of production, a relation which has sprung up historically and stamps the worker as the direct means of creating a surplus-value." The specific investigation of services was never advanced very much in Marxian scholarship beyond generalities, verities and platitudes, in particular because most authors do not grasp that the problem is about the specifically capitalist modification of the division of human work, the restructuring of inputs and outputs to conform to the requirements of capitalistic value-accretion, and to the pattern of the real subsumption of human work by Capital. Ernest Mandel correctly noted that many activities which are called or statistically classified as "production of services" are really production of tangible goods, or part of the production of goods (Le troisieme age du capitalisme). That is really because in the foundational categorisation of the occupational division of work, statisticians lack a theoretical basis or scientific analysis of social relations, and hence, the categorisation made is descriptive, it is based just on the actual occupational divisions which there actually are, and which of course are modified over time, so that, over time, some additional divisions are added to the classification etc. and at some point the classification has to be drastically revised. But Ernest Mandel also likes to use the concept of "veralgemeinte warenproduktion" ("generalised commodity production") to describe the capitalist mode of production. While this formula is useful to describe the universalisation of market relations, it does not however do real justice to Marx's contention, stated in the quote I mentioned, that "Capitalist production is not merely the production of commodities, it is ESSENTIALLY the production of the Mehwert." What is essential for Marx, to be precise, is the transformation of human work into a value-accretion process, under conditions where the increment can be privately appropriated by someone else. So it is not really Marx who has a "labour theory of value", it is rather capitalism itself, which transforms human work into a commercial value, as Diane Elson pointed out once. This qualification by Marx which I just stated is also the basis for Tony Cliff's idea that the USSR must have been "state capitalist" (a bureaucratic elite extracting a surplus from production) giving rise to a whole sectarian or apologetic dispute about the social nature of the USSR which doesn't really contribute very much to solving the problem of socialist transition and the emancipation of the working classes, i.e. the transformation of production and exchange relations to create more freedom and efficiency for all, on an egalitarian basis (and not just for some). The real problem was, that the bolsheviks came to power without having a clear understanding about the socialist transformation of Russian society, and therefore, in many ways, ended up running roughshod over the workers and peasants. Because of their sentimental attachment to an ideological doctrine, many Marxists refuse to understand this, and then you get only apologetics presenting failures as successes, rather than the development of effective theory based on scientifically gathered facts. Of course, in a society characterised by social classes, the modalities of the subordination of workers and peasants for the purpose of the appropriation of a surplus from their work by other social classes are variegated, and not at all limited to the specifically capitalist mode of production Marx describes. The IS position is confusing because (1) it constantly mixes up problems of the exploitation of classes and strata by other classes and strata with problems to do with the specific characteristics of the capitalist mode of production, and (2) it bases its definitions only on production relations, abstracting from relations of distribution and consumption, whereas you need to be concerned with all of these to understand anything about it. Now, it was very clear to the bourgeois classes of the bourgeois-imperialist countries that the USSR wasn't capitalist, that's part of the reason they wanted to fight it, so then, if socialists start to argue that the USSR was capitalist, then quickly we get into obscurantism, and cannot solve the problems of socialist transformation of civil society (in general, I think Mandel's position was better, but you have to get rid of his apologetic formulations, which derive from the difficulty of trying to uphold a third campist position during the intense, extremely polarised debates of the Cold War epoch where serious scientific debate on the basis of facts often was not possible and drowned in verbiage). To return to the problem of "services" however: the analytical or conceptual difficulty for economic science is always in understanding what specifically the object of trade is, as far as services are concerned. To some, who are aware of the sophistication of trade relations in the "information age", it may seem like a joke when I say this, or maybe a sexual pun, but, if you're really interested in the socialist transformation of society, then you do have to concern yourself with this problem I think. It is precisely because the object of trade becomes opaque or more difficult to understand and the trading relations very complex, that the growth of services seems to indicate that we are having to contend with a completely new form of society which is no longer capitalist. And then it's important to get back to basics and do a real empirical, quantitative investigation, rather than toss around postmodernist metaphors. I have tried to do this previously in a very simple way by just looking at the occupational division of work to see how many people are involved in different categories of work, what the proportions are. Market forces just develop the division of work in conformity with the imperative of value-augmentation irrespective of human needs, interests and desires, those "things" are only relevant, insofar are they are a means for value-augmentation and capital accumulation. And since this occurs through a competitive process, the strong outcompete the weak, in which case, social inequality continually increases, creating a massive maldistribution of effective buying power and, while credit bridges the gap, ultimately, it causes the erosion of the capitalist world market (the imperialist system tearing itself apart economically, and causing wars over strategic resources which cannot be claimed any longer other than through brute force). The wreckers, the detractors, and the enemies of human progress, of course want to prevent this scientific work and drown scientific inquiry in babble and verbiage, nevertheless, this work is very important to do, at least if you are interested in a move forwards of the human species towards a free, egalitarian society, rather than a move backwards to slave society and barbarism due to the extremisation of social inequality, i.e. the extreme divisions the weaknesses and strengths of humanity, as incorporated into specific wealthy and poor people who can hardly recognise each other anymore as "human" because their development is so far apart, and so different (the postmodernist preoccupation with "difference" is, of course, in good part the ideological reflex of the exascerbation of social inequalities). Jurriaan