There are lot of great inventions. The type of research strategy should they use is A/B Test, Switchback and Synthetic Control.
Uber is known to have so many ways to run experiment. They often applies several experimental methodologies in different cases as they are diverse in nature. They use them in testing out a new feature to improve the app design.
Uber's XP often gives room for engineers and data scientists to monitor treatment effects so as to make sure that they do not cause regressions of any key metrics.
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