

    \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}


