Voxeu

It seems obvious that lowering the cost of communication among innovators would facilitate scientific and technological progress. Yet, few studies examine this relationship. This column explores the introduction of the first modern postal system in Britain in 1840 and its effect on the number of citations between pairs of scientists and on patenting. The gradient with which citations declined with distance-based postage costs fell and patenting increased in locations that experienced more significant improvements in letter market access due to the reform.

The federal government provided $296 billion in disaster relief for catastrophic events in the US between 2001 and 2019. However, excessive bailouts may encourage economic activity to remain in exposed areas. This column shows that increased post-disaster efforts due to political motives result in more people living in hazard-prone coastal regions. A dynamic spatial general equilibrium model predicts that current post-disaster policies improve aggregate welfare at the expense of overall GDP and productivity losses, and encourage sorting into exposed areas.

Evidence suggests that sovereign debt markets are taking climate effects into account in pricing, creating the potential for a climate-debt doom loop. However, climate risks to fiscal stability do not attract the same attention as climate risks to financial stability. This column discusses how integrated assessment models can be linked with stochastic debt sustainability analysis to inform our understanding of climate risks to sovereign debt.

The Covid-19 pandemic has profoundly affected the ecosystems that spur innovation and creativity around the world. This CEPR Press eBook untangles how the Covid shock shaped the innovation landscape of the world’s major economies, and how scientists, entrepreneurs and creative professionals responded to the crisis.