AM Investment Strategies
AMS Spring 2023

First Study of 3D Printing’s Impact on Trade Finds It Has Positive Effects


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A recent study in the Journal of International Economics argues that additive manufacturing (AM) has had “positive and significant effects” on international trade for a number of sectors that have adopted the technology. Apparently, this is the first time that research on 3D printing’s impact on trade has been published in an academic journal.

The paper, titled “Is 3D printing a threat to global trade? The trade effects you don’t hear about,” is coauthored by Caroline Freund, an economist as well as the dean of the University of California, San Diego (UCSD) School of Global Policy and Strategy, along with Alen Mulabdic and Michele Ruta, two economists at the World Bank. Freund was also previously the World Bank’s global director of Trade, Investment and Competitiveness.

Image courtesy of Stratasys

The study primarily focuses on hearing aids, the sector where AM has dominated the greatest share of the market thus far. At this point, 99 percent of the planet’s hearing aids are estimated to be printed, and the percentage has been about that high for some time now.

Thus, hearing aids can presumably give us the clearest picture of what happens to international trade in a sector, once it has adopted AM. Freund, Mulabdic and Ruta found that hearing aid exports rose around 80 percent in the places where the technology was adopted. The researchers also studied 35 other export products in other sectors that have begun to use AM, including prosthetics, aerospace, and footwear, and found similar results.

According to the study’s abstract, “These [positive and significant effects on trade] are stronger for more complex and lighter goods. The results counter widespread views that 3D printing will shorten supply chains and reduce trade.” In the study, Freund wrote, “Policymakers often view 3D printing as a means to shorten supply chains, when in fact it is more likely to enhance trade and reshape supply chains.”

Hearings aids undergoing the 3D printing process. Image courtesy of Sonova.

I think that very last point, concerning the potential for the technology to reshape supply chains, is the most important takeaway from the study. Lately, this is the attribute of AM that the industry as a whole has been staking itself on most, so having hard evidence of that is both crucial, as well as likely to spur further investigation into the same topic.

More broadly, beyond the purely academic implications, the fact that this can be taken as a sort of position paper on AM from the World Bank is perhaps of greater significance than the specifics of the study itself. This may seem overly simple, but I think that if the World Bank is praising something, it has a better chance of succeeding than most other developments.

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