The worsening degradation of natural resources urgently requires the adoption ofmore sustainable management practices. This need has led to growing interest andinvestment in monitoring systems for tracking the condition of natural resources.Although grounded in concepts of sustainability, the...

Longitudinal household data can have considerable advantages over much morewidely used cross-sectional data. The collection of longitudinal data, however, may bedifficult and expensive. One problem that has concerned many analysts is that sampleattrition may make the interpretation of estimates...