MPSC 2026 Prelims Paper-I · Question 48 of 100

Correct — option (1), "Only (a) is correct." David W. Pearce and Jeremy J. Warford are the authors of World Without End: Economics, Environment and Sustainable Development, published in 1993 by Oxford University Press for the World Bank, and one of the standard texts through which environmental economics entered mainstream development policy. Statement (a) reports their framework accurately. Their argument is that an economy's productive base should be understood as an overall capital stock with three components: man-made physical capital — machinery, buildings, roads, the produced assets of ordinary national accounting; human capital — the skills, education and health embodied in the workforce; and environmental or natural capital — soils, forests, fisheries, water, mineral deposits and the atmosphere's capacity to absorb waste. The insight that gave the framework its force is that conventional national accounting counts the first, gestures at the second, and ignores the third, so that a country liquidating its forests or mining out its soils records the proceeds as income while the loss of the asset appears nowhere. Once environmental capital is placed inside the capital stock, that liquidation shows up for what it is: consumption of capital, not income. Statement (b) inverts their conclusion. On their account sustainable development requires that the overall capital stock be maintained — that it should not decline over time, so that each generation passes on to the next a productive base at least as large as the one it inherited. The statement as printed says the opposite: that sustainable development implies the three forms of capital decrease in the growth process. A shrinking capital stock is precisely what makes a growth path unsustainable. And notice that statement (b) can be rejected without knowing anything at all about Pearce and Warford. Take the word 'sustainable' at its ordinary meaning — capable of being kept up. A process that runs down the stock it depends on cannot be kept up; it must terminate when the stock is gone. So any definition claiming that sustainability means the capital base decreases is self-contradicting on its face. Testing an unfamiliar attribution against the plain meaning of its own key term is one of the most reliable moves available in a prelims paper, because examiners falsify statements by reversing a direction far more often than by inventing a name. Statement (a) standing and statement (b) falling, the credited choice is option (1). Option (4), "None of the above", is offered here as an escape. It is available only when every named alternative fails, and it cannot be taken while statement (a) survives intact.

• (2)Only (b) is correct. — Option (2) keeps the reversed statement and discards the accurate one. It accepts that sustainable development means the capital stock decreases — which contradicts the plain sense of the word sustainable and the whole thrust of the Pearce and Warford framework — while rejecting the three-way composition of the capital stock, which is the framework's single most-quoted feature. A candidate marking this has recognised the names, failed to check the direction of the claim, and assumed the more surprising-sounding statement must be the intended one.
• (3)Both (a) and (b) are correct. — Option (3) is the commonest error on this question, because statement (a) is verifiably right and statement (b) is written in the same authoritative register with the same three components named. But 'Both' requires each component to hold independently, and statement (b) reverses the condition: Pearce and Warford's requirement is that the overall capital stock be non-declining, not declining. One reversed word inside a compound option is enough to close it, however solid the other statement is.
• (4)None of the above — Option (4) is the escape, and it is closed because statement (a) survives. The three-part composition of the capital stock — man-made physical, human and environmental — is exactly what Pearce and Warford set out, and it is the reason their work is cited in discussions of green accounting. An escape option is earned by knocking down every named alternative in turn; taken as a refuge from an unfamiliar pair of author names, it simply converts uncertainty into a quarter-mark penalty.

The capital-stock approach translates sustainability into a balance-sheet condition. Treat the economy's productive base as a stock with three components — man-made physical capital, human capital and natural or environmental capital — and define a development path as sustainable if that total stock is not run down over time, so each generation inherits at least as much productive capacity as the last. Two versions of the rule are distinguished. Weak sustainability requires only that the total be maintained, permitting one form of capital to substitute for another: a forest may be cut if the proceeds are invested in machinery or in schooling of equivalent value. Strong sustainability denies that substitution beyond a point, holding that some natural capital is critical — the climate system, biodiversity, an aquifer — because it has no man-made substitute and its loss is irreversible, so natural capital must itself be non-declining. The associated policy rule for exhaustible resources is Hartwick's: invest the rents from depleting a resource into reproducible capital, and consumption can be held constant indefinitely. Green accounting, environmental valuation and the idea of adjusted net savings all descend from this way of framing the problem.

Pearce and Warford's book belongs to the wave of work that followed the Brundtland Commission. The World Commission on Environment and Development, chaired by Gro Harlem Brundtland, published Our Common Future in 1987 and gave the canonical definition of sustainable development as development that meets the needs of the present without compromising the ability of future generations to meet their own needs. That formulation is intuitive but not operational: it does not say what has to be held constant. The economists' contribution during the years that followed was to make it operational by recasting intergenerational fairness as a condition on capital. Pearce's earlier Blueprint for a Green Economy (1989) had already carried the argument into policy debate, and World Without End (1993) set it out for a development-economics audience, covering measurement of sustainable development, population and environment, market and policy failure as causes of resource degradation, and the links between trade and the environment. For MPSC purposes the examinable core is small and stable: the three components of the capital stock, the non-declining condition, and the weak-versus-strong distinction.

• David W. Pearce and Jeremy J. Warford wrote World Without End: Economics, Environment and Sustainable Development, published in 1993 by Oxford University Press for the World Bank.
• In their framework the overall capital stock has three components — man-made physical capital, human capital and environmental or natural capital — and conventional national accounting captures the first two poorly and the third not at all.
• Sustainability is stated as a condition on that stock: the overall capital stock should not decline over time, so that each generation hands on a productive base at least as large as the one it received.
• Weak sustainability permits substitution between the forms of capital so long as the total is maintained; strong sustainability holds that critical natural capital has no man-made substitute and must itself be non-declining. Hartwick's rule — invest resource rents in reproducible capital — is the associated policy prescription.
• The Brundtland Commission (World Commission on Environment and Development), chaired by Gro Harlem Brundtland, gave the canonical definition of sustainable development in Our Common Future (1987): development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

• Missing a reversed direction inside an otherwise accurate attribution. The names, the three components and the register of statement (b) are all right; only the verb 'decrease' is wrong, and that is the whole falsification.
• Assuming an unfamiliar author name means the statement cannot be judged. Statement (b) contradicts the ordinary meaning of 'sustainable' and can be rejected on that ground alone, without knowing who Pearce and Warford are.
• Treating human capital as part of physical capital. The framework counts three distinct components, and questions are built on whether a candidate can name all three separately.
• Confusing the Brundtland definition with the capital-stock condition. Brundtland states the ethical principle; the capital-stock formulation is the economists' attempt to make that principle measurable.

The Commission approaches sustainable development from two directions. One is the institutional and chronological line — Brundtland 1987, Rio 1992, Agenda 21, the Millennium Development Goals and then the Sustainable Development Goals with their targets and indicators. The other, which this question belongs to, is theoretical: named economists, their definitions, and the components of their frameworks. Theory questions of this kind are almost always built as a true statement paired with a reversed one, because reversing a direction is the cheapest way to falsify a definition without inventing anything. The defence is to read every statement about a named theorist twice — once for the attribution and once for the direction of the claim — and to check the claim against the ordinary meaning of its own central term before conceding it.

No directly related past PYQ was found.

• practice — not a real PYQ

  Which distinction is drawn between 'weak' and 'strong' sustainability in environmental economics ?

  • (a)Weak sustainability applies to developing countries and strong sustainability to developed countries
  • (b)Weak sustainability permits substitution between natural and man-made capital, while strong sustainability requires natural capital itself to be non-declining
  • (c)Weak sustainability concerns renewable resources and strong sustainability concerns non-renewable resources
  • (d)Weak sustainability is measured in physical units and strong sustainability in monetary units

  Answer(b) Weak sustainability permits substitution between natural and man-made capital, while strong sustainability requires natural capital itself to be non-declining. Weak sustainability asks only that the total capital stock be maintained, so a depleted forest may be offset by an equivalent investment in machinery or education. Strong sustainability denies that beyond a point, on the ground that critical natural capital such as the climate system or biodiversity has no man-made substitute and its loss is irreversible.

• practice — not a real PYQ

  The definition of sustainable development as 'development that meets the needs of the present without compromising the ability of future generations to meet their own needs' comes from :

  • (a)The Stockholm Declaration, 1972
  • (b)The Brundtland Report, Our Common Future, 1987
  • (c)Agenda 21, adopted at Rio in 1992
  • (d)The Kyoto Protocol, 1997

  Answer(b) The Brundtland Report, Our Common Future, 1987, produced by the World Commission on Environment and Development under Gro Harlem Brundtland. The Stockholm Conference of 1972 opened international environmental diplomacy, Agenda 21 was the action programme adopted at the Rio Earth Summit five years after Brundtland, and the Kyoto Protocol dealt specifically with greenhouse gas emission commitments — none of the three is the source of the definition.