How the World Keeps Food Affordable (And What Failed Along the Way)

Commodities: Markets, Performance, and Strategies
Editors: H. Kent Baker, Gregory Filbeck, Jeffrey H. Harris
ISBN: 9780190656010

The second half of Donald Larson’s chapter shifts from diagnosis to response. If Malthus and Hotelling were right about scarcity, food should be wildly expensive by now. It is not. Here is why, what governments tried, and what might actually help small farmers handle risk.

Productivity saved the day (so far)

Real food prices in 2016 were not far from 1900 levels. That is remarkable given population grew from 1.6 billion to 7.4 billion. People also eat more calories and more protein per capita now.

The Green Revolution is the hero of this story. High-yielding, fertilizer-responsive seeds spread from the 1960s through the 1980s. By 1998, 82% of major crop area in Asia used improved varieties. Global wheat productivity grew 2.3% annually. Rice grew 1.9%. Maize grew 2.1%. All above population growth.

Cereal yields more than doubled between the 1960s and 2010s. Land under cultivation barely moved (+8.5% over 45 years). Calories per hectare jumped 240%. Irrigation expanded. Marketing chains lengthened as rural populations shrank as a share of total population.

The lesson: technology and research investment kept food affordable despite rising demand. Public agricultural R&D paid high dividends.

When governments tried to control prices

By the 1980s, almost every country used marketing boards, public stocks, or stabilization funds to manage food prices. International commodity agreements tried to coordinate global markets.

Most failed. Some spectacularly (tin agreements, Australian wool reserve). Others just got too expensive during fiscal crises in the 1990s. By 2000, international stabilization programs were dead. Domestic programs rolled back too.

The motivation was valid. Volatility hurts growth. The tools were flawed. Price management through public intervention distorted markets, encouraged overproduction or underinvestment, and drained government budgets.

Policy shifted. Instead of controlling prices, governments focused on productivity, infrastructure, rural services, and safety nets for when prices spike.

Looking forward: the productivity challenge

Population keeps growing through 2050. Incomes keep rising. Diets shift toward more protein. Land and water are strained. The next productivity wave needs to come from existing farmland, especially in sub-Saharan Africa where yield gaps are largest.

Risk blocks adoption. Poor farmers without insurance avoid technologies that could raise yields. Fixing that is as important as inventing better seeds.

Extending risk markets to smallholders

Larson reviews three mechanisms to connect small farmers to formal risk markets:

Warehouse receipt systems

Farmers deposit grain at certified warehouses and get a receipt they can use as loan collateral. Banks can seize stored, insured, graded inventory on default without court delays. Warehouses earn storage fees.

Beyond credit, receipts enable forward sales and smoother marketing timing. Systems work best with mature legal and financial infrastructure. They often start with high-value export crops (coffee, pepper) and expand from there. Ghana, Zambia, and Ethiopia offer real examples.

Contract farming

Buyers contract with farmers for future delivery at agreed terms. Old version: cotton and sugar processors providing inputs on credit. New version: supermarkets and fast-food chains demanding quality, traceability, and food safety.

Contract farming reduces price and marketing risk for farmers. It can boost revenue per hectare even when price risk stays the same. Long-term buyer relationships cut transaction costs that keep developing-country markets informal and local.

It is not perfect. Power imbalances between smallholders and large buyers create conflicts. But research consistently shows participants gain from lower risk and better technology access. Balance of negotiating power and multiple buyer options matter most.

Index insurance

Weather-based or yield-index insurance pays out on objective triggers (rainfall below X, regional yield below Y). No field inspections needed. Much cheaper than traditional crop insurance.

Pilot programs exploded in the 2000s. Some showed increased technology adoption when farmers were insured. But commercial uptake stayed low. Basis risk is the killer: your farm floods while the regional rainfall index says you are fine.

Poor farmers also struggle to pay upfront premiums. Government disaster aid undercuts the value of buying insurance for rare catastrophic events. Binswanger-Mkhize argues self-insurance and diversification work better for wealthier farmers. Formal insurance fills a narrow gap.

What Larson concludes

No sustained upward or downward trend in food prices since 1900, despite population and income growth. Volatility has not clearly increased either, though food remains among the most volatile commodity groups.

Governments cannot reliably control price levels or volatility through market intervention. They can invest in productivity, build institutions, and extend risk tools.

Index insurance, warehouse receipts, and contract farming each help in specific contexts. None is a silver bullet. Warehouse receipts need mature markets. Contract farming needs fair power dynamics. Index insurance needs better trigger design and realistic expectations.

The policy shift from “manage prices” to “manage consequences” is the big story. Safety nets for consumers. Risk tools for producers. Research funding for productivity. That is the framework Larson leaves us with.

For commodity investors, the takeaway is structural: food supply responds to technology and policy over decades, but spikes still come from weather, trade bans, and inventory shocks. The long game is productivity. The short game is storage.

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