I found this amusing:
There may be a complex market living in your gut: Conventional theories used by economists for the past 150 years to explain how societies buy, sell, and trade goods and services may be able to unlock mysteries about the behavior of microbial life on earth, according to a study by researchers from Claremont Graduate University, Boston University, and Columbia University.
The findings, published July 29 in the open access journal PLOS ONE, provide new insight into the behavior of the planet's oldest and tiniest life forms, and also create a new framework for examining larger questions about biological evolution and productivity.
Joshua Tasoff, an economics professor at Claremont Graduate University, conducted the study with Michael Mee of the Department of Biomedical Engineering at Boston University and Harris Wang of the Department of Systems Biology at Columbia University. ...
Although microbes are ubiquitous, they interact with each other in complicated ways that are not well understood. A large fraction of microbial life exists in complex communities where the exchange of molecules and proteins is vital for their survival. They trade these essential resources to promote their own growth in ways that are similar to countries that exchange goods in modern economic markets.
Inspired by these similarities, Tasoff, Mee, and Wang applied the general equilibrium theory of economics, which explains the exchange of resources in complex economies, to understand the trade of resources in microbial communities. ...
The results confirmed the team's predictions. As trade increased, the bacterial communities grew faster. And while all of the microbes benefited from trade, the more a bacteria strain exported, the slower it grew relative to the importing bacteria strain.
"That means that species face a tradeoff between growing their communities faster versus increasing their own population relative to that of a trading partner," Tasoff said.
The findings open the door for the application of other economic concepts that could improve our understanding of microbial and other biological communities, Tasoff said.