War Against Sugar — Sugar Market, Tax Incidence, Demerit-Good Intervention and Effects on Sugar-Cane Countries

Answers

(a) Production–consumption gap and the sugar price [2] — explain

When world production exceeds consumption (e.g. 2011–2014), there is a surplus of sugar at the prevailing price, exerting downward pressure that lowers the price. When consumption exceeds production (e.g. 2015–2016), there is a shortage, exerting upward pressure that raises the price.

(b)(i) Incidence of the sugar-beverage tax [3] — explain

A per-unit tax raises producers’ costs, shifting supply up/left from S₀ to S₁; the price rises from P₀ to P₁ (by less than the full tax) and quantity falls. The split of the burden depends on price elasticity of demand: Extract 1 implies demand for sugar beverages is price-inelastic (the tax had “no significant effect on consumer choice” because of addiction-like cravings, PED < 1). With inelastic demand, the price rises by a large share of the tax, so consumers bear the larger burden.

A per-unit sugar tax shifts supply up/left (S₀→S₁) against price-inelastic demand; the price rises substantially from P₀ to P₁ and quantity falls slightly, so consumers bear the larger share of the tax.

(b)(ii) Why the tax improves fiscal health [2] — explain

The tax improves public finances two ways. First, lower sugar consumption reduces obesity and diabetes, easing the burden on government healthcare spending. Second, because demand is price-inelastic, quantity falls little, so the tax raises substantial tax revenue. Lower spending and higher revenue together improve fiscal health.

(c) Why intervene in the prescription-drug market [5] — explain

The market fails through imperfect information. Drug firms’ marketing leads doctors to recommend prescription drugs beyond what is medically necessary (Extract 3), so consumers over-estimate the private benefit and demand is too high — above the level that reflects true marginal benefit. At the free-market quantity Qm, the marginal cost exceeds the true marginal benefit, so there is over-consumption and over-allocation of resources relative to the socially optimal Qs, generating a deadweight welfare loss.

Marketing-inflated demand (D_high) exceeds demand based on true benefit (D_true). Free-market quantity Qm exceeds the socially optimal Qs (where true MB = MC); the shaded triangle between the curves over Qs–Qm is the deadweight welfare loss from over-consumption.

Assuming the government has accurate information, intervention (e.g. regulating drug marketing or correcting information) brings demand down to the level reflecting true benefit, aligning the market quantity with the socially optimal output and removing the deadweight loss.

(d) Impact on beverage firms and sugar-cane producing countries [8] — discuss

Beverage firms. The impact may be minimal: as in Thailand, firms can reformulate recipes to use less sugar and avoid the levy, keeping prices competitive — so price, quantity and profit are little affected. Alternatively, where firms cannot reformulate, the higher cost of taxed sugar as an input raises marginal cost, raising price and lowering quantity, so profit falls (ceteris paribus). Evaluation: the outcome turns on firms’ ability to repackage or shift consumer tastes to maintain revenue, and on their initial profit cushion.

Sugar-cane producing countries. As the sugar tax reduces demand for sugar (a derived demand from beverage production), these countries may face falling demand for their sugar exports: export revenue falls and they export fewer units, worsening their current account and balance of trade. Evaluation: this may be muted. Sugar is heavily protected by export subsidies, and India and Pakistan keep cane prices artificially high; sugar-cane supply does not fall much as prices fall (the crop can be cut back for years). So booming supply keeps sugar prices low even as demand softens, limiting the fall in export revenue.

Judgement. The net impact on both agents is likely modest and contingent. Beverage firms with the flexibility to reformulate or differentiate can largely insulate their profits; the inelasticity of demand also limits the quantity fall. For sugar-cane countries, the persistent oversupply and pervasive subsidies cushion the price and hence export revenue, so the current-account effect is small for low-cost producers but more painful for those (like India) already facing a glut. The severity in each case depends on market power and the ability to adapt (firms) and on the country’s level of development, supply rigidity and reliance on sugar exports.