This paper studies the dynamics of fundamental research. We develop a simple model where researchers allocate their effort between improving existing fields and inventing new ones. A key assumption is that scientists derive utility from recognition from other scientists. We show that the economy...

We study the influence of social networks on labour market transitions. We develop the first model where social ties and job status co-evolve through time. Our key assumption is that the probability of formation of a new tie is greater between two employed individuals than between an employed...