metascience

Rain, Rain, Go away: 192 potential exclusion-restriction violations for studies using weather as an instrumental variable (Published at AJPS)
Lots of studies use weather as an instrumental variable, but the core assumption of IV implies that an instrument should only affect one variable. I develop a full methodology for how to find and review possible exclusion restriction violations.
Jonathan Mellon
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Rain, Rain, Go away: 192 potential exclusion-restriction violations for studies using weather as an instrumental variable (Published at AJPS)
Regularized Regression Can Reintroduce Backdoor Confounding: The Case of Mass Polarization (Accepted at APSR)
Regularization can reduce the problem of extreme inference but inappropriate use can lead to reopening backdoor paths and lead to highly biased estimates.
Jonathan Mellon, Christopher Prosser
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Regularized Regression Can Reintroduce Backdoor Confounding: The Case of Mass Polarization (Accepted at APSR)