"What these examples have in common is that they illustrate two of the key tasks of the social sciences: to measure important social variables over time and space, and to identify the social mechanisms that lead to variation in these variables. There are large problems of methodology and conceptual clarification that need to be addressed in both parts of this agenda. On the side of measurement, we have the problems of arriving at consistent and revealing definitions of economic wellbeing, using incomplete historical sources to reconstruct estimates of prices and wages, and using a range of statistical methods to validate and interpret the results. And on the explanatory side, we are faced with the difficult task of reconstructing social processes and forces in the past that may have powered the changes we are able to document, and with the task of validating the hypotheses we have put forward on the basis of historical evidence."

"From the testers' point of view, they had loads of experience with sophisticated aircraft. They wanted clear rules, better safety protocols, and reasonable work expectations from the Project Wing managers. At the same time, some members of the flight-testing crew felt like their expertise on how to accomplish their mission was being dismissed, people told us. In contrast, some of the team's managers felt as if the crew's skills with combat aeroplanes and military drones made them somewhat overqualified and their ideas overkill for the task at hand, according to a person close to the company. It was a disconnect between two groups with very different mentalities about how to get things done."