In universities all over the world, hiring and promotion committees regularly hear the argument: this is important work because it is about to appear in prestigious journal X. Moreover, those who allocate levels of research funding, such as in the multi-billion pound Research Assessment Exercise...

We collect data on the movement and productivity of elite scientists. Their mobility is remarkable: nearly half of the world's most-cited physicists work outside their country of birth. We show they migrate systematically towards nations with large Ramp;D spending. Our study cannot adjudicate on...

We test how a reduction in travel cost affects the rate and direction of scientific research. Using a fine-grained, scientist-level dataset within chemistry (1991-2012), we find that after Southwest Airlines enters a new route, scientific collaboration increases by 50%, an effect that is...

How should the productivity of research universities be measured? This task is difficult but important. The recent Research Excellence Framework in the UK, which was based on peer review, suggests that there has been a marked improvement in UK academic research in economics and in many other...