as well as nonignorable treatment assignment in observational studies. To analyse these research designs, the methods covered include experiments, matching, instrumental variables, ...

On watching this video, students should be able to: Distinguish between an observational and experimental study. Explain the main reason why a randomised experiment can if done well, be used as a test ...

On watching this video students should be able to: List different types of observational study ... Discuss why not all research questions can be investigated using an experiment and identify examples ...

The research is published ... this using only observational data. This means researchers don't need to perform costly, and ...

as well as nonignorable treatment assignment in observational studies. To analyse these research designs, the methods covered include experiments, matching, instrumental variables, ...