\begin{table}%t2
\caption{\label{tab:Mdiskparams}Parameters describing the lognormal distribution of
 circumstellar disk masses~$\mu$ and~$\sigma$, from different sources.}
\small%%\centerline

 {
\begin{tabular}{lccc}
\hline\hline
Source& $\mu$ & $\mdisk(\mu)[\msun]$ &$\sigma$\\ 
\hline
Fit to Taurus  & --1.66 & 0.022 & 0.74 \\
Fit to Ophiuchus & --1.38 & 0.042 & 0.49\\
Robinson et~al. (\cite{robinsonetal2006})$^{{a}}$ & --1.3 & 0.05 & 0.25 \\
Ida \& Lin (\cite{idalin2004a})$^{{b}}$ & --1.48 & 0.033 & 1.0 \\
\hline
\end{tabular}}
\medskip
$^{{a}}$ The value given by Robinson et~al. (\cite{robinsonetal2006}) is obtained by extrapolating the observed $\mu=-2.31$ of Andrews \& Williams (\cite{andrewswilliams2005}) back to the assumed initial state, and $\sigma$ is reduced to 0.25 from observed value~0.5.\\
$^{b}$ The values of Ida \& Lin (\cite{idalin2004a}) are calculated using the value for the MMSN from Hayayshi (\cite{hayashi1981}).
\end{table}