In the Nigeria–US lecture example where everyone benefits from trade, is it realistic to assume no one will object to trade? Give real-life examples and state the assumptions required for “no one objects to trade.”

What the lecture example is trying to show

The Nigeria–US example is a classic way to illustrate comparative advantage: if each country specializes in what it produces relatively efficiently and they trade, total output and average living standards can rise. That statement is about aggregate gains, not about how those gains are split among different groups.

Why people still object even when the country gains

Trade changes relative prices. When the domestic price of an import-competing good falls, consumers gain, but firms and workers in that industry can lose income. So even if the net gain is positive, the politics can be negative because losses are concentrated (easy to see and organize) while gains are diffuse (spread across many consumers).

Real-life examples where trade had clear losers

• US manufacturing and the “China shock”: Many US consumers gained from cheaper imported goods, but some manufacturing workers and local labor markets faced job losses and wage pressure when import competition rose.
• NAFTA and sectoral impacts: In the US, some industries and regions faced adjustment costs; in Mexico, some farmers were pressured by competition from imported US corn, while other export sectors expanded.
• Nigeria and import competition (e. g., textiles, poultry, rice): Cheaper imports can lower food and clothing prices for consumers, but they can also hurt domestic producers that cannot match import prices, leading to closures or demands for tariffs and bans.

The key assumptions behind “no one will object to trade”

To get from “there are gains from trade” to “no one objects,” you typically need assumptions that remove distributional conflict:

1. Frictionless factor mobility: Workers can move instantly from the losing sector to the winning sector, with no skill mismatch.
2. No unemployment and low adjustment costs: Job search is quick, retraining is easy, and communities can adapt without long periods of hardship.
3. Compensation is feasible and actually happens: The winners compensate the losers so everyone is at least as well off (a move from Kaldor-Hicks “could compensate” to Pareto “does compensate”).
4. Competitive markets and no market power: Price reductions from trade are passed on to consumers rather than captured mostly as markups.
5. No large distributional or regional inequality concerns: Even if average income rises, the resulting inequality does not trigger political opposition.

How to state a realistic conclusion

A realistic version is: trade usually raises total income, but it also redistributes income within countries. Whether trade is politically supported depends on how big the adjustment costs are, how mobile workers are, and whether policies (training, relocation help, wage insurance, targeted transfers) share the gains broadly enough that opposition is limited.