Discuss the role of randomization in mitigating confounding in observational studies.
Instruction: Explain how randomization can be simulated or approximated in observational study designs to reduce confounding effects.
Context: This question delves into advanced techniques of achieving unbiased estimates of causal effects in non-experimental settings.
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Randomization helps by making treatment assignment independent of potential outcomes through the study design. It balances measured and unmeasured baseline factors in expectation, although a particular finite sample can still be imbalanced...