When Value Chains Deepen Trade Agreements: The Role of Services

In the modern global economy, the journey of a single product is rarely a straight line from a factory floor to a store shelf. Instead, it often resembles a complex relay race where parts and services cross borders multiple times before the final item is complete. This intricate web of international cooperation is known as a global value chain. Within these chains, services play a surprisingly dominant role; the design, software, logistics, and financial planning that go into making a physical good often matter as much as the raw materials themselves. As nations become more deeply woven into these chains, they face a new challenge: how to keep the flow of goods and services smooth and secure. While countries have long signed trade deals to lower taxes on imports, these simple agreements often fail to address the complex rules and regulations that sit behind the border, such as intellectual property rights or competition policies. The question arises: does the deepening of these international production networks actually push countries to sign more sophisticated, "deep" trade agreements that cover these broader issues, and does the role of services change the answer?

A team of researchers set out to answer this question by examining the relationship between global value chains and the depth of trade agreements signed between nations. They focused specifically on the role of services, distinguishing between the different ways countries participate in these chains. On one hand, there is "backward" participation, where a country uses imported services or parts to make its own exports. On the other, there is "forward" participation, where a country's own services or goods are used by other nations to make their exports. The researchers combined massive datasets tracking value-added trade from 1990 to 2015 with a detailed database of trade agreements to see if higher levels of integration led to more comprehensive treaties. Their analysis revealed a clear pattern: the more deeply two countries are integrated into global value chains, the more likely they are to sign a deep trade agreement. Specifically, a one percent increase in the flow of value-added trade between two nations raises the probability of them signing a preferential trade agreement by 1.7 percentage points.

The study found that not all connections are created equal. The drive to sign these deeper agreements is strongest when countries rely on imported inputs, known as backward linkages. When a nation depends heavily on foreign services to produce its own exports, it has a powerful incentive to secure those supply lines through a robust treaty. In these cases, a one percent increase in backward linkages increases the probability of signing a deep agreement by 2.6 percentage points, a stronger effect than that of forward linkages. This suggests that the need for stability and security in the supply chain is a primary motivator. Furthermore, the researchers discovered that services are the critical engine behind this trend. While goods are still traded in large volumes, the integration of services—such as engineering, finance, and logistics—has a more profound impact on the decision to deepen an agreement. Countries involved in service-related value chains are significantly more likely to include legally enforceable provisions in their deals, moving beyond simple tariff reductions to cover complex areas like investment rules and competition policy.

The depth of these agreements also varies depending on the specific rules being negotiated. The data shows that service-related value chains are particularly effective at pushing countries to include detailed provisions on non-tariff measures and institutional frameworks. These are the behind-the-border rules that govern how businesses operate, such as standards for safety or regulations on state aid. The researchers found that when countries are deeply integrated through services, they are more likely to agree on stringent commitments regarding these institutional rules, which are essential for the smooth functioning of modern, service-heavy supply chains. This is especially true for provisions that fall within the scope of the World Trade Organization, where the need for clear, enforceable rules is most acute. The study also highlighted that these dynamics are not limited to wealthy nations; in fact, the flow of value-added trade creates a new and powerful motive for countries with different levels of economic development to sign deep agreements. When a high-income country relies on inputs from a lower-income partner, the need to stabilize that relationship often leads to a deeper, more institutionalized partnership than would exist otherwise.

Ultimately, the research suggests that the complexity of modern production has outgrown the capacity of simple trade deals. As nations become more dependent on each other for the services and components that make up their exports, the cost of uncertainty rises. The findings indicate that this interdependence acts as a catalyst, pushing countries to formalize their relationships with agreements that are legally binding and comprehensive. It is not merely about lowering taxes anymore; it is about creating a stable environment where a designer in one country can trust that the manufacturer in another will be able to access the necessary digital tools and financial services without sudden regulatory hurdles. By focusing on the role of services and the direction of trade flows, the study provides a clearer picture of why nations are moving toward deeper integration, revealing that the invisible threads of service-based production are just as strong, if not stronger, than the physical goods they help create.