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The wisdom of sustainable communities in the digital era: the case of efficient energy management
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6. Factors of success in resource management (after Pretty 2003, Ostrom 2007 and Ostrom, forthcoming) Resource System Social System Clarity of system boundaries Number of users Size of resource system Norms, Rules, Social Capital (incentives/sanction) Resource unit mobility Relations of trust Productivity Connectedness in networks and groups Storage capacity Resource Dynamics/ Predictability
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14. Extraction Levels Adapted from Sethi & Somanathan 1996 Efficient Total Effort Level Static Nash Total Effort Level Total Costs of Effort Total Production <
15. Equity – driven Cooperation Payoff: Utility: Net Average Product “ equity” Proportion cooperators Community benefit fn Excludable cooperation benefits
16. Interactions of resource users Note: payoffs are dependent on effort and state of resource Case 1 Perfect Monitoring Case 2 Local Monitoring C D C D C D C D
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Notas del editor
Hardin’s paper had a strong influence; for long time it was believed that CPR should be regulated by the government or privatized Communication: in face-to-face discussions participants tend to discuss what they all should do and build norms Currently there is much discussion on community-based management (but it only works in certain conditions) Privatization = internalization of externalities Often modeled with prisonner’s dilemma
Without top down enforcement or privatization, e.g. local community-based management, global commons such as climate Multitude of factors (empirical studies in forestry, irrigation, fisheries, Ostrom 1990)
Is it stable when resource dynamics change? ABM
Researchers have found a non-linear relationship between the number of users and self-organization. Small groups are frequently unable to undertake costly activities while transaction costs are higher for large groups. The impact U1 on self-organization also depends on its relationship to size of the resource system ( RS3 )
Game theoretic approach
Resource extraction guided by fairness norms (based on a commonly agreed upon level of sustainable resource extraction) Norm of restraint and norm of fairness (that everybody follows the norm of restraint), failure to obey the rules is a violation of a social norm “punished” by ostracism Integration of resource dynamics with evolutionary game or learning dynamics
We never think about the labor needed for the production of the good itself, but only about the labor needed to extract the resource which is then used in production Total effort = sum of individual efforts
Omega (fC) increasing in fC; first derivative >0 The fairness norm: Failure to follow the norm of restraint as everybody else is “punished” by refusal of help which exerts a material damage on the defector that is proportional to the difference in payoffs
Monitoring Updating based on comparison of payoffs Full information versus local information