This study provides novel insights into the internal organization of the European Parliament (EP) by analyzing the logic of amendment success on the institutions committee level. Three research hypotheses on potential factors driving the success and failure of amendments at the committee stage are tested for the Committee on the Environment, Public Health and Food Safety (ENVI). Employing stratified random sampling, a dataset containing 550 amendments from 55 ENVI members was compiled and analyzed with multinomial multilevel regressions. The results suggest that a committee member's general...