We estimate the costs of occupational mobility and quantify the relative importance of task content as a component of total mobility costs. We use a novel approach based on a model of occupational choice which delivers a gravity equation linking worker flows to occupation characteristics and transition costs. Using data from the Current Population Survey and the Dictionary of Occupational Titles we find that task-specific costs account for no more than 15% of the total transition cost across most occupation pairs. Transition costs vary widely across occupations and, while increasing with the dissimilarity in the mix of tasks performed, are mostly accounted for by task-independent occupation-specific factors. The fraction of transition costs that can be attributed to task-related variables appears fairly stable over the 1994-2013 period.

We study the effects of financial market incompleteness on occupational mobility. Incomplete insurance not only generates an increase in consumption volatility, but also reduces occupational mobility. The correlation of labor supply with occupational productivity is lower than under complete markets. Low-asset workers remain in low-productivity occupations even when the expected value of switching is positive. Negative occupational productivity shocks therefore have larger effects on such workers' future earnings than they would for better insured workers. In a calibrated model, we find that the welfare costs of market incompleteness can be as large as 12 percent of lifetime consumption.

Global Mobility of Research Scientists: The Economics of Who Goes Where and Why brings together information on how the localization and mobility of academic researchers contributes to the production of knowledge. The text answers several questions, including "what characterizes nationally and internationally mobile researchers?" and "what are the individual and social implications of increased mobility of research scientists?" Eight independent, but coordinated chapters address these and other questions, drawing on a set of newly developed databases covering 30 countries, including the US, the UK, France, Germany, Italy, Japan, Russia, and China, among others. - Combines theoretically sound and empirically fascinating results in one volume that has international and interdisciplinary appeal. - Covers topics at the forefront of academic, business, and policy discussions - Data used in the chapters available at a freely-accessible website