

    \filetitle{dot}{Gross rate of growth pseudofunction}{modellang/dot}

	\paragraph{Syntax}

\begin{verbatim}
dot(EXPR)
dot(EXPR,K)
\end{verbatim}

\paragraph{Description}

If the input argument \texttt{k} is not specified, this pseudofunction
expands to

\begin{verbatim}
((expression)/(expression{-1}))
\end{verbatim}

If the input argument \texttt{k} is specified, it expands to

\begin{verbatim}
((expression)/(expression{k}))
\end{verbatim}

The two derived expressions, \texttt{expression\{-1\}} and
\texttt{expression\{k\}}, are based on \texttt{expression}, and have all
its time subscripts shifted by --1 or by \texttt{k} periods,
respectively.

\paragraph{Example}

The following two lines

\begin{verbatim}
dot(Z)
dot(X+Y,-2)
\end{verbatim}

will expand to

\begin{verbatim}
((Z)/(Z{-1}))
((X+Y)/(X{-2}+Y{-2}))
\end{verbatim}


