Intercaste marriage narrows India's child nutrition gap where it happens. Endogamy keeps it rare

Child malnutrition in India tracks caste closely. Children born into Scheduled Caste households, the constitutional category for Dalits, the communities once branded “untouchable,” and into Scheduled Tribe households, the category for Adivasi communities, are stunted and underweight at higher rates than children born into dominant-caste households, even after accounting for household income. That gap is one reason nutrition outcomes function, in demographic research, as a proxy for caste inequality more broadly: they capture something intergenerational and structural that income alone can miss.

What the study found

A paper by Rukmi Pradeep and Srinivas Goli, “The Equalising Effect of Marital Exogamy: Intercaste Marriages and the Reduction of Child Nutrition Inequality in India,” published online in the Journal of International Development on June 22, 2026, tests that proxy against a specific policy question, pooling National Family Health Survey rounds and other government survey data from 2005 to 2021. Does marriage across caste lines, exogamy, narrow the nutrition gap for the children born of those marriages? The paper’s title states its conclusion plainly, an equalising effect, and the finding holds up under the scrutiny that title invites: using Wagstaff’s corrected concentration index alongside panel random-effects and pooled cross-sectional Probit models, Pradeep and Goli find that a one-unit increase in intercaste marriage is associated with a 37 to 43 percent decline in stunting inequality, after adjusting for the income and education controls that might otherwise explain the effect away on their own.

What Ambedkar argued

The question has a long lineage in Ambedkarite thought, and it is worth being precise about which lineage. B.R. Ambedkar argued in Annihilation of Caste that endogamy, marriage confined within caste, is caste’s actual mechanism, the practice that manufactures and re-manufactures the boundary every generation. But Ambedkar himself was blunter about intermarriage’s limits than the popular reading of him allows: “the real method of breaking up the Caste System was not to bring about inter-caste dinners and inter-caste marriages but to destroy the religious notions on which Caste was founded,” he wrote, calling appeals to inter-dining and intermarriage alone “a futile method of achieving the desired end.” Writing in Round Table India, Anshul Kumar has made the same point directly against the popular misreading: Ambedkar’s own remedy was to destroy the Shastras’ religious sanction for caste, not to promote matrimonial reform as an end in itself. He did not dismiss intermarriage itself. In Annihilation of Caste he called it the real remedy, while arguing that Hindus would not take it up until the Shastras lost their hold on them:

“I am convinced that the real remedy is inter-marriage. Fusion of blood can alone create the feeling of being kith and kin, and unless this feeling of kinship, of being kindred, becomes paramount, the separatist feeling—the feeling of being aliens—created by Caste will not vanish.”

— B.R. Ambedkar, Annihilation of Caste (1936), section 20, Columbia University edition

Nearly a century later, this paper asks a narrower, testable version of the question Ambedkar was skeptical of: not whether intermarriage dismantles caste on its own, which he already doubted, but whether it produces a measurable material effect on the bodies of the children born from it.

Why it cannot close the gap alone

Even a robust equalising association does not, on its own, make intermarriage a workable policy lever. Intercaste marriage remains statistically rare across India: national surveys have put the rate at roughly 5 to 6 percent of marriages for decades, with essentially no upward trend, and sharp regional variation. On the broader measure Pradeep and Goli use, couples whose partners reported different caste groups, 14 percent of couples in the National Family Health Survey of 2019-21 married across groups, ranging from 2.2 percent in Meghalaya to 22.3 percent in Karnataka among the states with at least 100 couples in the study’s sample. An association with over a third less nutrition inequality among the households who intermarry says relatively little about the other 94-plus percent of households who do not, and show no sign of doing so at scale. A finding that exogamy narrows nutrition inequality where it occurs is a finding about a mechanism, not a finding about how to close the gap for the country’s children as a whole.

What to watch

• The rate. Whether intercaste marriage, roughly 5 to 6 percent of marriages with no upward trend, begins to rise, and where: on the study’s broader measure it ranged from 2.2 percent in Meghalaya to 22.3 percent in Karnataka in 2019-21.
• The gap. Whether the next National Family Health Survey shows the caste gap in child stunting narrowing nationally, which the study’s mechanism alone cannot deliver at today’s rate.

What the study contributes is a check on an assumption reform-minded readers are inclined to want confirmed: that intermarriage helps, materially, the households who undertake it, and helps by a specific, sizable margin rather than a token one. Whether that finding ever travels into a policy case for promoting intermarriage, or stays a more modest claim about a mechanism operating at too small a scale to move national numbers, depends on whether the roughly 6 percent who intermarry can become 60, not on whether the mechanism itself works. On the paper’s own numbers, it does.