In Praise of Observational Evidence: Why RCTs Aren't Always the Gold Standard

In Praise of Observational Evidence

While Randomized Control Trials are often hailed as the gold standard of science, I argue that observational evidence offers unique efficiency and power. From John Arbuthnot's 18th-century analysis of birth rates to James Lind's scurvy experiments, history shows we can uncover profound truths without expensive interventions. Observational studies often leverage massive sample sizes that modern trials cannot match, making them a superior tool for understanding complex phenomena in medicine and public health when RCTs are impractical.

"It is a rare randomized trial that can detect a 0.3% difference in a binary random variable — but Laplace could, more than 200 years ago."