Within the Red List of the International Union for Conservation of Nature, species distribution models (SDM) are used with two main purposes: (1) to estimate extents of occurrence as a parameter of risk of extinction and, ...

The Campbellian tradition provides a conceptual framework to assess threats to validity. On the other hand, different models of causal analysis have been developed to control estimation biases in different research designs. ...

Traditional economic theory suggests that poor consumers are consistently more price sensitive than their wealthier counterparts. Recent research, however, indicates that various economic-related burdens, such as the cost ...