Acceptance, tracking, and particle identification efficiencies are compared in data and in simulation for electrons from photon conversions in material. Upper panel: TRD acceptance times tracking efficiency (at least five reconstructed tracklets were required for this example). For transverse momenta below 4 GeV/c the TRD was not used for eID. Lower panel:TOF matching efficiency times particle identification efficiency | ![](https://alice-publications.web.cern.ch/sites/default/files/papers/2867/TPCTOFTRD_efficiency_comparisonMCdata-19211.png ) |