Synopsis: The topology of trade

Modeling shows that globalization of trade makes the world economy more sensitive to shock and slower to recover.

Over the past several decades, economic activity has shifted from local trade to a more globalized network of services, manufacture, and consumption. The same tools of network theory that have worked well at describing other interconnected activities—from telecommunications systems to evolving populations of biological species—can yield insights into the effects of globalization on the world economy. Writing in Physical Review Letters, Jiangkui He and Michael Deem of Rice University in the US specifically examine how trade networks respond to abrupt change during increasing globalization, and they reveal some surprising effects.

The authors construct networks that represent how countries trade with each other. They measure whether a given trade network is nonhierarchical (i.e., evenly distributed trade among many countries) or hierarchical (i.e., treelike, containing clusters of countries that trade among themselves more frequently than with others outside the cluster) by means of a special correlation coefficient. He and Deem then show that the real-world global trade network has become less hierarchical over time, an expected result of globalization. However, when they apply a shock to their model system, for example, an economic recession, the system is both more sensitive to the shock and tends toward more hierarchical trading. Moreover, the less hierarchical the trading environment, the longer it takes the system to recover from shocks—perhaps lending insight into the current global economic slump. – David Voss


Announcements

More Announcements »

Subject Areas

Interdisciplinary Physics

Previous Synopsis

Nanophysics

Graphene’s prisoners

Read More »

Next Synopsis

Quantum Information

Towards a handheld optical table

Read More »

Related Articles

Synopsis: Trees Crumbling in the Wind
Materials Science

Synopsis: Trees Crumbling in the Wind

Lab experiments with wooden rods help explain why all trees—irrespective of size or species—break when battered by wind blowing at the same critical speed. Read More »

Focus: Sensing Delays Control Robot Swarming
Interdisciplinary Physics

Focus: Sensing Delays Control Robot Swarming

A robot group clusters together or disperses based on each robot’s reaction time for sensing light, a finding useful for search-and-rescue missions.   Read More »

Focus: Wikipedia Articles Separate into Four Categories
Interdisciplinary Physics

Focus: Wikipedia Articles Separate into Four Categories

A study of the entire editing history of English Wikipedia shows that the articles cluster into four categories based on how frequently and how aggressively they are edited. Read More »

More Articles