spb/uqo-research-db

1\begin{table}[H]\centering\small2\caption{Difference-in-differences around ChatGPT. Dependent variable is the winsorized forward 12-month return; firm and year fixed effects; SE double-clustered by firm and year. Treatment is fixed at the firm's pre-event (2019--2021) AI exposure.}\label{tab:did}3\begin{tabular}{lcc}\toprule4& Treated$\times$Post & Exposure$\times$Post \\5& (binary) & (continuous, per SD) \\\midrule6Coefficient & 0.0170 & 0.0269 \\7\textit{t}-statistic & (0.78) & (1.51) \\8N (firm-years) & 6790 & 6790 \\9Firm \& Year FE & Yes & Yes \\\bottomrule10\end{tabular}\end{table}