Human capital is the stock of skills, knowledge, health and capacities embodied in persons, understood as the product of deliberate investment and as a source of future returns in productivity and earnings. The analogy with physical capital is exact and intended: schooling, training, migration and medical care all involve present costs — fees, effort and, crucially, forgone earnings — undertaken in the expectation of a stream of benefits over a working life. What distinguishes this capital is that it is inseparable from its owner. It cannot be sold, inherited outright or repossessed by a creditor, and it perishes with the person.
The concept turns the wage from a price into a return. If two workers earn differently, human capital theory looks first to differences in their embodied productive capacity rather than to the positions they occupy or the groups they belong to. That single move is what makes the theory attractive to policymakers and objectionable to sociologists.
Schultz, Becker and the rate of return
Theodore Schultz, in his 1960 presidential address to the American Economic Association and the resulting paper Investment in Human Capital, argued that the unexplained residual in national growth accounting — output rising faster than measured inputs of land, labour and machinery — was the yield on investment in people. Post-war recovery in Europe and Japan, he noted, was far faster than destroyed physical assets could explain, because the skills survived the bombing.
Gary Becker supplied the formal apparatus in Human Capital (1964). He treated the individual as choosing among investments by comparing the discounted value of expected earnings with costs, and introduced the distinction between general training, which raises productivity for many employers and is therefore paid for by the worker through lower wages during training, and specific training, useful only to the present firm and therefore shared in cost and return between firm and employee. From this framework came the standard empirical device: the rate of return to a year of schooling, estimated by regressing the logarithm of earnings on years of education and experience, an equation associated with Jacob Mincer.
The policy appeal
Few economic concepts have travelled so far into policy. If education and health are investments rather than consumption, then spending on them is not welfare but growth strategy, and it can be ranked against roads and power plants by the same criterion. Estimated returns to schooling — generally found to be high, and typically highest at the primary level in poor countries — became the standard argument of the World Bank and of ministries of finance for universal elementary education, for female schooling, and for nutrition and immunisation programmes. The vocabulary of skilling, employability and demographic dividend descends directly from this literature.
Screening, signalling and credentials
The first sociological difficulty is that the correlation between schooling and earnings does not establish that schooling creates productivity. Michael Spence showed in Job Market Signaling (1973) that if education is cheaper to acquire for the already able, employers who cannot observe ability will rationally pay for the certificate even if the schooling taught nothing whatever. Education then functions as a signal and a screening device, sorting workers rather than improving them. The private return is real; the social return may be close to zero, because the same sorting could in principle be achieved more cheaply.
Randall Collins pressed the argument further in The Credential Society. Qualifications, he held, are instruments of social closure by which status groups defend privileged occupations, and the observed growth in required credentials tracks competition between groups rather than any rise in the technical difficulty of the work. This is credentialism, and it predicts what human capital theory does not: qualification requirements rising for jobs whose content is unchanged.
Structure, discrimination and cultural capital
The second difficulty is that the theory locates the explanation of earnings entirely in the supply of workers and says almost nothing about the structure of demand. Segmented and dual labour market theories observe that identical qualifications yield very different returns in the organised and unorganised sectors, and that movement between them is restricted. Where jobs are rationed, adding to the stock of educated workers raises the queue rather than the wage.
Nor does the theory accommodate discrimination easily. Becker treated it as a taste that competitive markets should erode; the empirical literature on caste, gender and race finds it durable, operating through networks, referral hiring and statistical inference about groups. Field experiments on hiring in India, reported in Blocked by Caste, found that applicants with identical qualifications fared differently by caste and religion of name — an outcome the human capital model cannot generate.
Pierre Bourdieu offered the deepest counter-account. In The Forms of Capital he argued that economic capital is only one form, and that the returns to schooling depend on cultural capital — linguistic competence, tastes, dispositions and familiarity with the codes of the school — which is transmitted invisibly within the family, and on social capital, the network of usable connections. The certificate converts inherited advantage into apparently earned achievement. What human capital theory reads as investment, Bourdieu reads as reproduction dressed in the language of merit.
The Indian evidence
India is a difficult case for the pure theory. Returns to schooling in Indian data are conventionally found to be modest at low levels and to rise sharply at higher secondary and above, which is the opposite of the pattern the early policy literature expected and points towards screening in a labour market where regular salaried jobs are scarce. Learning outcomes reported by successive rounds of annual school surveys show that years of schooling and actual competence diverge widely, so that the years counted in a Mincer equation measure very different things for different children.
The most visible anomaly is the mismatch between qualification and employment: graduate unemployment exceeding that of the unschooled, thousands of postgraduates applying for posts requiring an eighth-standard pass, and a vast coaching economy oriented not to skill but to examination rank. Meanwhile the returns to a degree vary sharply by the institution's standing, by English proficiency and by caste — precisely the inherited advantages Bourdieu described.
For the UPSC answer
Begin by stating the theory accurately in its own terms — Schultz on growth, Becker on general and specific training, the rate-of-return method — because examiners reward a fair statement before the critique. Then build the criticism in a definite sequence: Spence on signalling, Collins on credentialism, segmented labour market theory on the neglected demand side, the discrimination literature, and finally Bourdieu on cultural capital as the hidden condition of return. Use Indian material for weight: returns concentrated at higher levels of schooling, the qualification-employment mismatch and the coaching industry. Conclude that human capital remains indispensable as a policy argument for investing in people, but is inadequate as a sociological explanation of who gets what and why.
References & further reading
- Schultz, T. W. (1961). Investment in Human Capital. American Economic Review, 51(1).
- Becker, G. S. (1964). Human Capital: A Theoretical and Empirical Analysis. Columbia University Press.
- Spence, M. (1973). Job Market Signaling. Quarterly Journal of Economics, 87(3).
- Blaug, M. (1976). The Empirical Status of Human Capital Theory: A Slightly Jaundiced Survey. Journal of Economic Literature, 14(3).
- Collins, R. (1979). The Credential Society. Academic Press.
- Bourdieu, P. (1986). The Forms of Capital, in Richardson, J. (ed.) Handbook of Theory and Research for the Sociology of Education. Greenwood.