“…Figure 2 provides examples of workers' productivity measures which were used in studies published in leading economics journals, and whose findings can be used to inform policymakers and practitioners [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12]. The figure shows that performance is not only measurable for low-skilled jobs with routine tasks, but that it can also be measured for rather knowledge-intensive, non-routine professions, such as lawyers, physicians, or scientists.…”