Leadership theories debate what makes a good leader. Over the years, many schools of thought have developed that give different explanations about where leaders come from and how they can be ...

Wild and semi-wild plants are factual resources for a local community when they satisfy its needs. According to the bio-cultural approach, these plants and associated knowledge help define the ...

As anyone who is familiar with personality trait theory knows, researchers have identified a “big five” of dispositional tendencies that reliably predict human behavioral patterns and show up almost ...

We study the efficiency of administering different subsets of a large collection of items in a sample survey to different people to estimate the distribution of several correlated traits. The designs ...