In the context of an ongoing debate on the type of institutions or tenurial arrangements that are appropriate for the sustainable management of common pool resources (CPRs), this article examines the role played by local institutions in determining the conditions of two forests located in the Middle Hills of Nepal. The institutional robustness of the forests? governance systems is evaluated using Ostrom?s (1990) design principles that characterize the configuration of rules devised and used by long-enduring CPR institutions. The findings show that the two forests are different in level of historical degradation as well as present condition, and these differences are generally explained by the structural characteristics of the local institutions governing the forests. The analysis indicates that Ostrom?s design principles are useful for analyzing institutional robustness of local forest governance systems. However, some of the principles need modification or expansion if they are to be prescribed for forestry situations.
