OxTalks will soon move to the new Halo platform and will become 'Oxford Events.' There will be a need for an OxTalks freeze. This was previously planned for Friday 14th November – a new date will be shared as soon as it is available (full details will be available on the Staff Gateway).
In the meantime, the OxTalks site will remain active and events will continue to be published.
If staff have any questions about the Oxford Events launch, please contact halo@digital.ox.ac.uk
We characterize the instruments which optimally combine a set of exogenous shocks with some non-random measures of shock exposure, building on the framework of Borusyak and Hull (2023). Our characterization has implications for treatments capturing spillovers in social and transportation networks, simulated instruments for policy eligibility, and shift-share instruments. We show how significantly more precise estimates of Medicaid take-up and crowd-out effects can be obtained by combining policy expansion shocks with non-random variation in Medicaid eligibility.
