11 citations · 11 across the 4 of their papers we have counts for
3 papers · 1 filter
Towards more plausible point-identifying assumptions in two-sample Mendelian randomization
Fernando Pires Hartwig, Neil Martin Davies, George Davey Smith
Two-sample Mendelian randomization (MR) is a widely applied methodology in epidemiology. In two-sample MR, summary data (typically, regression coefficients and standard errors) qua…
Homogeneity in the instrument-treatment association is not sufficient for the Wald estimand to equal the average causal effect for a binary instrument and a continuous exposure
Fernando Pires Hartwig, Linbo Wang, George Davey Smith +1
Background: Interpreting instrumental variable results often requires further assumptions in addition to the core assumptions of relevance, independence, and the exclusion restrict…
Average causal effect estimation via instrumental variables: the no simultaneous heterogeneity assumption
F. P. Hartwig, L. Wang, G. Davey Smith +1
Background: Instrumental variables (IVs) can be used to provide evidence as to whether a treatment X has a causal effect on an outcome Y. Even if the instrument Z satisfies the thr…