Previous studies among middle-aged and older adults have shown that engagement in exercise with others is more strongly associated better mental health than alone. However, the applicability of such findings to workers remains unclear. This study aimed examine whether 1) time spent exercising were lower stress response distress workers, 2) self-determined motivation toward mediated these associ...

In November 2014, OPEC announced a new strategy geared towards improving its market share. Oil-market analysts interpreted this as an attempt to squeeze higher-cost producers, notably US shale oil, out of the market. Over the next year, crude oil prices crashed, with large repercussions for the global economy. We present a simple equilibrium model that explains the fundamental market factors th...