In a photoemission experiment, the ejected electron generates heat by ohmic losses in the semi-infinite solid left behind. This inelastic scattering of the electron causes a downward shift in observed spectra. If this effect is large enough, it can mimic a pseudogap. I point out that, counterintuitively, this effect is most pronounced in poorly conducting metals: in good metals the electron's field is screened out. A brief introduction to the calculation method is presented and I survey various materials for which this loss effect may have to be included in analysis of experimental data.
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