Communication is key for self-organized systems


April 29, 2010

Research conducted in a computerized microworld by scientists at Arizona State University and Indiana University, including Nobel laureate Elinor Ostrom, show how common-pool resources – such as fisheries, forests, water systems or even bandwidth – can be managed effectively by self-organized user groups under certain conditions.

The findings are published April 30 in the journal Science. Download Full Image

“We use different experiments with specially designed computer simulation games that include costly fines, communication, a combination of both and a period where neither punishment nor communication is allowed. These experiments help us identify which variables increase the level of cooperation,” said Marco Janssen, social science modeler at the School">http://shesc.asu.edu/">School of Human Evolution and Social Change in ASU’s College">http://clas.asu.edu/">College of Liberal Arts and Sciences and the study’s lead author.

The experiments involve a timed computer game played simultaneously by college students in a lab. The students sit in individual cubicles and have their own avatars in the game. They go about individually “harvesting” a resource – in this case, colored dots – in an experimental environment, along with the other players. If they harvest them too fast, the resource runs out and the game ends. If they manage them sustainably, the dots regenerate, allowing them to harvest more and earn more points. The more points the students have, the more they are paid real dollars at the end, creating an incentive for them to take the game seriously, explained Janssen.

To do well requires the participants to monitor their own behavior, but also to be mindful of what the others are doing, Janssen said. In some cases, the players are allowed a brief opportunity to communicate via chat rooms to strategize and make decisions regarding where and when to harvest resources, or collect tokens. They also determine whether or not to impose costly fines for overuse of resources by a member of the group, and when to sanction a player.

“Spatial and temporal resource dynamics were included in our laboratory experiments in order to capture these two critical variables,” Janssen said.

He explained that adding the space and time complexity component to their experiments illustrated that stronger governance of common-pool resources does not always result in better harvesting.

This finding is contrary to the classic view of options regarding how to manage common resources, such as those based on Garrett Hardin’s famed example of the “tragedy of the commons” – the basis for much of the world’s policies for managing resources.

When participants make decisions without communicating, they overharvest, noted co-author Ostrom, founding director of ASU’s Center">http://csid.asu.edu/">Center for the Study of Institutional Diversity and a professor of political science in Indiana">http://college.indiana.edu/">Indiana University’s College of Arts and Sciences.

When given a chance to communicate, however, participants improve their joint outcomes greatly – and the effect is lasting even when communication is no longer possible, she said, adding that being able to use costly fines against each other did not improve harvest output.

“This study presents results from a more complex experimental setting than previous laboratory experiments on public goods or common-pool resources," said Ostrom, recipient of the 2009 Nobel Memorial Prize in Economic Sciences. "Since we conduct field research as well as experimental research we wanted to develop a more realistic setting than has been feasible in the past to assess how individuals cope with both the complexity and the temptations to overuse."

Other co-authors of the study “Lab Experiments for the Study of Social-Ecological Systems” are Allen Lee, a researcher at ASU, and IU doctoral student Robert Holahan.

According to Lee, more than 400 students at both universities participated in the experiments.

“With the ability to communicate, the students almost invariably cooperate with each other and improve their earnings by coming up with their own rules to govern how they harvest from the resource," Lee said. "The only time it breaks down is when there are one or two members in the group that disregard the rules they came up with.”

A next step is to take the sophisticated simulation games used in the experiments and convert them into educational games for youth.

“My hope is the games will get the next generation to think more deeply about the pressing social-ecological problems we are facing, and what it takes to manage resources sustainably,” Lee said. “Rather than just be entertained, it would be fantastic if the experience from the games ultimately led them to take action.”

Source:
Marco Janssen, marco.janssen">mailto:marco.janssen@asu.edu">marco.janssen@asu.edu

Media contacts at Arizona State University:

Scott Southward, scott.southward@asu.edu
480-965-4193

Media contact at Indiana University:

David Bricker, brickerd">mailto:brickerd@indiana.edu">brickerd@indiana.edu
812-856-9035

ASU Libraries offers account management tools


April 29, 2010

As the semester comes to a close, the ASU Libraries offer tools for faculty and students to manage their library accounts from anywhere in the world. 

All users can log into their library account online at http://lib.asu.edu/" target="_blank">http://lib.asu.edu/ to check due dates, renew items and verify that the correct e-mail address is associated with their account. In addition, users can renew their items by phone at any time at 480-965-2595. As material due dates may change due to recalls by other users, it is important to monitor both your online account and email notifications to be alerted to those changes as soon as possible. 

For our users’ convenience, the ASU Libraries offer several exterior book returns to return materials 24 hours a day, 7 days a week. Materials may be returned to any library book return, regardless of which library they were checked out from. Please note that library staff may process returned materials daily even if the library isn’t open, so due dates will be enforced accordingly.

For more information about library services during the intersession and summer sessions, please contact your specific library location. Contact information and hours for each location can be found on the http://lib.asu.edu/" target="_blank">ASU Libraries website. Download Full Image

Britt Lewis

Interim Communications Director, ASU Library