Oxford Events, the new replacement for OxTalks, will launch on 16th March. The two-week OxTalks freeze period starts on Monday 2nd March. During this time, there will be no facility to publish or edit events. The existing OxTalks site will remain available to view during this period. Once Oxford Events launches, you will need a Halo login to submit events. Full details are available on the Staff Gateway.
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.
