Approximation

Year Women in U.S. Labor Force (thousands)
1900 5319
1910 7445
1920 8637
1930 10,752
1940 12,845
1950 18,389
1960 23,320
1970 31,543
1980 45,487
1990 56,554
1995 60,944

\begin{figure} \centering\par\epsfig {file=grid.eps,height=.7\textwidth,width=.7\textwidth}\par\end{figure}

Recall that to transform the exponential into a linear model we change


\begin{displaymath}W = W_{\circ}*(1+r)^Y \rightarrow \log{W} = \log{(1+r)}*Y + \log{W_{\circ}} \end{displaymath}

Year log(W)
1900  
1910  
1920  
1930  
1940  
1950  
1960  
1970  
1980  
1990  
1995  

\begin{figure} \centering\par\epsfig {file=grid.eps,height=.7\textwidth,width=.7\textwidth}\par\end{figure}