Preferential trade agreements enhance global trade at the expense of its resilience

"There is a fundamental tradeoff between efficiency and growth, on one hand, and redundancy and resilience of growth on the other," says University of Tokyo researcher Ali Kharrazi, who started the work as a participant in the 2012 Young Scientists Summer Program at the International Institute for Applied Systems Analysis (IIASA).

Global commodity trade networks are increasingly complex dynamic systems, affected also by bilateral agreement between countries as well as broad regional trade agreements. Traditional economic methods struggle to account for the complexity of these interactions and their role in defining the resilience of trade. In the new study, Kharrazi and researchers at IIASA applied an approach first developed to study ecological networks in order to better understand the dynamics and properties of the global commodity trade system.

"In this study, for the first time, we demonstrate empirically how redundancy and efficiency in global trade networks can make them resilient to global economic shock, while sustaining both long- and short-term growth," says IIASA Advanced Systems Analysis Program Director Elena Rovenskaya, who contributed to the study.

"Local and global shocks, such as economic and financial crises, political instability, and environmental disasters require strategies to increase our capacity for resilience," says Kharrazi, "Policy and decision making should consider both the short and long term growth and resilience of growth based on inclusivity or exclusivity and intensity of trading partners from a network perspective."

The researchers point out that resilience and growth are not the only targets that should be considered in economic policymaking, adds Brian Fath, a researcher at IIASA and Towson University in the USA who also worked on the study. He says, "While our study showed growth is not hindered by redundancy, resilience of growth is not the only metric to consider in a healthy community. The merits of continued trade growth should be evaluated based on the three economic, environmental, and social pillars of sustainable development."