Pré-publication, Document de travail: We study a sequential experimentation model with endogenous feedback. Agents choose between a safe and risky action, the latter generating stochastic rewards. When making this choice, each agent is selfishly motivated (myopic). However, agents can disclose their experiences to a public record, and when doing so are pro-socially motivated (forward-looking). Disclosure is both polarized (only extreme signals are disclosed) and positively biased (no feedback is bad news). The extent of disclosure is non-monotone in prior uncertainty. Subsidizing disclosure costs can paradoxically lead to less disclosure, but more experimentation.