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No single “difficulty” score can tell you what an economy costs or set its prices. Economic complexity measures describe some of the productive capabilities reflected in what a country exports. Production costs, cross-border trade costs, and the cost of living are different questions, each requiring different data. Complexity can help explain what an economy may be able to make; it is not a price tag.
What does “difficulty” mean in this context?
“Difficulty model” is not an established name for a standard pricing model. The most defensible interpretation is the difficulty of developing the know-how, inputs, and coordination needed to produce goods that are less common or less related to a country’s existing capabilities. That idea belongs to economic complexity, not to a formula for calculating prices.
Four separate questions are easy to conflate:
- Capability: What kinds of goods can an economy produce, and how varied or uncommon are its exports?
- Production cost: What labor, materials, capital, technology, and coordination does it take to make a particular good?
- Trade cost: What costs arise when that good crosses a border?
- Cost of living: How do prices, product choice, quality, and consumer substitutions combine into a measure of what households pay?
A complexity measure can inform the first question. It does not, by itself, answer the other three.
What an economic-complexity score measures
ECI is based on export diversity and complexity
The Harvard Growth Lab’s Atlas of Economic Complexity describes the Economic Complexity Index (ECI) in terms of the diversity and complexity of a country’s export basket. It is used as a proxy for productive capabilities: the know-how and capabilities that may support making a range of goods, including goods that relatively few countries export. It is not a direct inventory of every kind of production taking place inside a country.
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Distance in the product space signals a capability gap
In the Atlas glossary, a product’s distance from the goods a country already exports represents how related that product is to the country’s existing know-how. A more distant product is less related, so entering its production may require coordinating capabilities and inputs the economy does not already have. That raises the risk of entry; it does not provide a unit cost, a probability of success for a particular firm, or a price forecast.
Exports are a proxy, not the whole economy
Because ECI-style measures are built around export baskets, they should not be treated as complete measures of domestic production, services, or household activity. A 2025 review, “Rethinking the literature on economic complexity indexes,” identifies wider methodological concerns: definitions may be unclear, theoretical grounding limited, gross exports potentially biasing, and the proposed concept may not match the method used to estimate it. These caveats matter when someone tries to turn a comparative capability measure into a precise statement about prices.
How the measures differ
These measures can complement one another, but they are not interchangeable. The scope and intended use determine what each one can support.
| Measure | What it represents | Data or scope established by the cited source | What it does not establish on its own |
|---|---|---|---|
| ECI-style economic complexity | Productive capabilities proxied by the diversity and complexity of exports. | The Harvard Growth Lab Atlas glossary describes the export-basket basis; coverage of every domestic activity is not established there. | The cost to produce a particular good, its selling price, or a household cost-of-living figure. |
| Export-price analysis | Price patterns that can contribute evidence about quality and trade conditions. | The European Union Publications Office released “Economic complexity analysis of export prices” in February 2024. | A direct measure of quality or capability without context about the product, market, and distance involved. |
| WTO Trade Cost Index | Estimated costs associated with trade between economies. | The WTO reports bilateral estimates across 75 economies and 25 sectors for 1995–2022; check its live resource for subsequent updates. | A country’s productive complexity, the cost of making goods domestically, or retail prices. |
| Price indexes and cost-of-living measures | Changes in prices interpreted in light of the goods and qualities consumers can choose among. | Redding and Weinstein’s February 2024 working paper analyzes trade price indexes; a June 2026 American Economic Review article by Ehrlich and coauthors examines quality-adjustment methods. | A comprehensive production-capability score or a stand-alone measure of trade barriers. |
Why a price index is more than an average of sticker prices
A price index aims to compare the cost of goods or consumption across places or time. That comparison becomes difficult when the products available change, when consumers can substitute one product for another, or when quality changes. A cheaper item is not necessarily an equivalent substitute for a more expensive one, and a newly available variety can affect what consumers can buy even if the average observed price changes little.
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Redding and Weinstein’s February 2024 U.S. Census Bureau Center for Economic Studies working paper, Accounting for Trade Patterns, states: “If firms and products are imperfect substitutes, we show that these price indexes depend on variety, average appeal (including quality), and the dispersion of appeal-adjusted prices.” In their framework, variety and average appeal, including quality, account for 40% of cross-section variation and 90% of time-series variation in comparative advantage; average prices account for less than 10%. Those are results from that paper’s analysis, not a general rule that average prices are unimportant in every setting or that complexity determines prices.
The measurement problem remains active. The June 2026 American Economic Review article “Quality Adjustment at Scale: Hedonic versus Exact Demand-Based Price Indices” compares approaches to quality adjustment. Its relevance here is that price measurement needs methods suited to changing products and quality; the article title alone does not establish a single method that applies to every index.
What export prices can—and cannot—tell you
Export prices are useful evidence in trade research, including analysis of product quality. But a price is an indirect signal: it may reflect quality or appeal as well as market conditions, product composition, and the destination involved. A comparison therefore needs to keep product, market, and distance context in view rather than treating a higher export price as proof that a country has more complex production or higher costs.
The European Union Publications Office’s 2024 publication on economic-complexity analysis of export prices addresses this kind of evidence. Export-price analysis can add information alongside capability measures; it is not a replacement for them, nor does a price difference alone identify its cause.
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Complexity, wages, and short-run prices
A 2025 theoretical working paper, “The Theory of Economic Complexity” by César Hidalgo and Viktor Stojkoski, connects ECI to the likelihood that an economy possesses many factors of production and models short-run prices, wages, and consumption. This provides a theoretical way to relate complexity to economic outcomes. It is not evidence that every observed price follows one rule, or that an ECI score can be converted into a wage, price level, or living-cost estimate. The model’s theoretical relationship should be kept distinct from an empirically validated pricing formula.
For a specific product, an operational cost estimate would still need the relevant labor, inputs, capital, technology, and coordination costs. The cited sources do not provide a complete cost model that turns an economy-wide complexity measure into those product-level figures.
How to use these measures without mixing them up
- Start with the question. If you want to know what an economy is capable of producing, an ECI-style export-complexity measure may be relevant. For the cost to make one product, collect product-level production inputs and costs. For border frictions, use trade-cost evidence. For household purchasing power, use an appropriately constructed price index.
- Check what the data cover. Note whether the measure represents exports, particular products or sectors, bilateral trade, or consumer purchases. Do not assume export data represent services or all domestic activity.
- Interpret prices in context. For price comparisons, ask whether product variety, quality, substitution, and the markets being compared have been accounted for.
- Keep conclusions proportional to the measure. Treat a complexity score as evidence about a proxy for productive capabilities—not as a production-cost estimate, trade-cost figure, or cost-of-living index.
Can you price an economy by its production difficulty?
Not from a single difficulty or complexity score. Economic complexity can help describe the productive capabilities associated with a country’s export basket, and theory can explore links between those capabilities, wages, prices, and consumption. But the sources do not establish a universal empirical rule that sets an economy’s prices from its complexity. To answer a pricing question, first specify whether you mean the cost of making a good, the cost of trading it, or the cost of living—and use evidence designed for that question.
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