Composition Adjusted-Labour Input (CALI) measures account for workers’ differences in skills and productive capacity. This study reviews the most relevant literature to have produced CALI estimates to date and presents a generic approach to produce CALI measures for 21 countries. It finds that education and age (proxy for work experience) are two key workers’ characteristics to be included in CALI measures, with additional workers characteristics having a more limited impact. Replacing a traditional measure of labour input, such as hours worked, with a measure of CALI in the growth accounts leads to a significant downward revision in multifactor productivity (MFP) growth in countries that experience large changes in the composition of labour.