A regional logistic function model for crude oil production

The logistic function has been used to describe the discovery and production of oil and natural gas at the national level. This type of functional representation provides a direct approach for estimating the available supply of the resource and the time at which that supply will be essentially depleted. The mathematical characteristics of the function imply restrictions, which are not necessarily applicable to natural resource-production patterns. We examine these restrictions in the context of crude-oil production at a regional level. We attempt to show that statistical estimates of the functional parameters based on actual crude-oil production could satisfy the mathematical restrictions inherent in the logistic function.     

Interactive effects of extraversion, neuroticism, and social relationships on subjective well-being.

Previous research has indicated that there is a relation between extraversion and subjective well-being (SWB), and that the sociability component of extraversion primarily accounts for this relation. Interactive effects of extraversion and social relationship variables on SWB were hypothesized and found in Study 1 using the Extraversion scale from the 16 PF, the Well-Being subscale of the Differential Personality Questionnaire, and several social relationship scales administered to 291 college students. Several multiple regression analyses indicated that strength of social relationships was a strong predictor of SWB only for introverted individuals. Study 2 replicated these findings with the Eysenck Personality Inventory and revealed important interactive relations between extraversion, neuroticism, and social relationships in predicting SWB. A strong relationship between extraversion and SWB occurred only among individuals who were highly neurotic or who had poor social relationships. (PsycINFO Database Record (c) 2010 APA, all rights reserved)