\begin{table}[htbp]
\centering\small
\begin{threeparttable}
\caption{HAR regressions for the ``No change'' contract}
\label{tab:har_rv}
\begin{tabular}{l rr rr}
\toprule
 & \multicolumn{2}{c}{$RV_t=|r_t|$} & \multicolumn{2}{c}{$RV_t=r_t^2$} \\
\cmidrule(lr){2-3}\cmidrule(lr){4-5}
Regressor & Coef. & (SE) & Coef. & (SE) \\
\midrule
    Constant & 0.994 & (0.725) & 32.296$^{*}$ & (19.078) \\
    $RV^{(d)}_t$ & -0.058 & (0.110) & -0.075 & (0.059) \\
    $RV^{(w)}_t$ & 0.628$^{**}$ & (0.281) & 0.325 & (0.294) \\
    $RV^{(m)}_t$ & 0.132 & (0.262) & 0.074 & (0.310) \\
\midrule
$R^2$ & \multicolumn{2}{c}{0.152} & \multicolumn{2}{c}{0.021} \\
Adjusted $R^2$ & \multicolumn{2}{c}{0.131} & \multicolumn{2}{c}{-0.004} \\
Joint $F$-test $p$-value & \multicolumn{2}{c}{0.000} & \multicolumn{2}{c}{0.488} \\
Observations & \multicolumn{2}{c}{123} & \multicolumn{2}{c}{123} \\
\bottomrule
\end{tabular}
\begin{tablenotes}
\small
\item \textit{Notes:} $RV^{(d)}_{t+1}=c+\beta_d RV^{(d)}_t+\beta_w RV^{(w)}_t+\beta_m RV^{(m)}_t+\varepsilon_{t+1}$ with $RV^{(w)}_t$ and $RV^{(m)}_t$ the averages of the daily measure over the past 5 and 22 calendar days \citep{corsi2009simple}. Daily log returns in percent; listing day excluded. Newey--West (5 lags) standard errors. $^{***}$, $^{**}$, $^{*}$: 1\%, 5\%, 10\%.
\end{tablenotes}
\end{threeparttable}
\end{table}