Demand and Supply Factors Determining the Output of Organic Food, and the Most Important Factor

Question

Recent years have seen a dramatic rise in the output of organic food products. Organic food products consist of whole foods like fruits, vegetables and dairy products, as well as processed food products like milk powders and cereal.

Discuss the demand and supply factors that determine the output of organic food products and evaluate which is the most important factor. [25]

Answer

The output of organic food — its equilibrium quantity — is set by demand and supply, with the extent of any change in output governed by the relevant elasticities. The word “dramatic” directs the analysis towards both large shifts and the elasticity magnitudes that translate a shift into a large change in quantity. Several factors push output up, all reinforcing; I argue the positive shift in taste and preference towards organic food is the most important, because it is a deep, durable change in consumer behaviour whose effect on output is least offset by the qualifications that weaken the other factors — though the verdict is sensitive to context, and elasticity reasoning (YED, CED, PES) is what discriminates between them.

Demand factor — rising income. As economies recovered from the 2008 financial crisis, consumer incomes and purchasing power rose, raising the demand for organic food. Because organic food is more expensive — costlier production and health benefits — it is plausibly a luxury good with income elasticity $YED > 1$, so demand rises more than proportionately with income and the demand curve shifts rightward by a large extent, raising equilibrium quantity substantially. This is therefore prima facie a major factor.

Demand factor — rising price of non-organic substitutes. Recent years saw the price of non-organic food rise (poor harvests, higher imported-food prices). Organic and non-organic foods are substitutes, so their cross elasticity of demand is positive ($CED > 0$): dearer non-organic food raises organic demand. But the two are weak substitutes catering to different consumer groups, so $0 < CED < 1$ and the demand increase is less than proportionate — a minor factor.

Demand factor — taste and preference. Rising health awareness — sustained healthy-eating campaigns such as those of Singapore’s Health Promotion Board — has shifted preferences towards organic food, raising demand and hence output. Unlike the income and substitute channels, this is a change in mindset, not a transient price or income movement, and so a strong candidate for the most important factor.

Supply factor — technological advancement. New pest- and drought-resistant crops and farming techniques (e.g. hoop houses) lowered the cost of producing organic food, raising supply and equilibrium quantity. But cost savings may be modest, and some firms move into higher-priced niche markets rather than expanding volume, so supply may shift rightward only modestly — a limited effect on output.

Supply factor — number of producers. Falling costs and rising demand made organic food a lucrative market, drawing in new firms (e.g. Danone) and so raising market supply. Yet new entry is often offset by the exit of firms that cannot compete, so the net rise in supply, and hence in output, is unlikely to be large.

Because the demand factors (income, substitute prices, taste) and the supply factors (technology, more producers) all raise quantity, their effects reinforce and equilibrium output rises unambiguously, even though the net effect on price is indeterminate. The question, however, asks which factor is most important.

Evaluation and judgement. I argue the positive shift in taste and preference is the most important factor. The justification is twofold. First, the competing factors are each weakened on inspection: world income rose only slowly during a sluggish recovery (the EU crisis, downgraded Singapore growth), so even with $YED > 1$ the demand effect of income was small; the substitute effect is damped by a low $CED$; and on the supply side, firm exit offsets entry and cost savings are modest. Taste, by contrast, is a deep-rooted change in consumption behaviour that, once established by a decade of health campaigns, durably raises demand. Second, a PES argument sharpens the verdict by good type: organic whole foods (fruit, vegetables, dairy) have $PES < 1$ owing to long gestation, so demand-side factors raise their output only modestly; organic processed foods (milk powder, cereal) have $PES > 1$, so for them the taste-driven demand increase produces a large rise in output — and it is processed foods where the taste effect is most powerfully transmitted to output. The conclusion is, however, context-dependent: in a highly developed country organic food may be a necessity ($0 < YED < 1$) or, conversely, income may be the dominant driver where $YED > 1$ and growth is strong; and where organic and non-organic processed foods are close substitutes, $CED > 1$ could make the substitute-price factor decisive. The defensible stand is that taste and preference is most important in the given context of slow income growth and weak substitutes, with the analytical use of YED, CED and PES — not a bare list of factors — carrying the judgement.