%0 Journal Article %T Using the Natural Experiment Study Design to Evaluate the Effect of a Change in Doctor¡¯s Roster on Patient Flow in an Emergency Department %A Dan Brun Pedersen %A Peter Hallas %J Archive of "Western Journal of Emergency Medicine". %D 2018 %R 10.5811/westjem.2018.5.36750 %X The effect of changes in doctors¡¯ rosters is rarely subjected to scientific evaluation. We describe how a natural experiment (NE) study design can be used to evaluate if a managerial decision about doctors¡¯ rosters has an effect on patient flow in an emergency department (ED). We hypothesized that an extra doctor each morning from 6 a.m. (i.e., a modified ¡°casino shift¡±) might improve the productivity of a hospital¡¯s ED %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6040912/