\Header{swiss}{Swiss Fertility and Socioeconomic Indicators (1888) Data}
\keyword{datasets}{swiss}
\begin{Description}\relax
Standardized fertility measure and socio-economic indicators for each
of 47 French-speaking provinces of Switzerland at about 1888.
\end{Description}
\begin{Usage}
\begin{verbatim}data(swiss)\end{verbatim}
\end{Usage}
\begin{Format}\relax
A data frame with 47 observations on 6 variables, \emph{each} of which
is in percent, i.e., in \eqn{[0,100]}{}.

\Tabular{rll}{
[,1] & Fertility & \eqn{I_g}{Ig}, \dQuote{common standardized
fertility measure}\\{}
[,2] & Agriculture& \% of males involved in agriculture
as occupation\\{}
[,3] & Examination& \% \dQuote{draftees} receiving highest mark
on army examination\\{}
[,4] & Education & \% education beyond primary school for
\dQuote{draftees}.\\{}
[,5] & Catholic & \% catholic (as opposed to \dQuote{protestant}).\\{}
[,6] & Infant.Mortality& live births who live less than 1
year.
}

All variables but \sQuote{Fertility} give proportions of the
population.
\end{Format}
\begin{Details}\relax
(paraphrasing Mosteller and Tukey):

Switzerland, in 1888, was entering a period known as the
\dQuote{demographic transition}; i.e., its fertility was beginning to
fall from the high level typical of underdeveloped countries.

The data collected are for 47 French-speaking \dQuote{provinces} at
about 1888.

Here, all variables are scaled to \eqn{[0,100]}{}, where in the
original, all but \code{"Catholic"} were scaled to \eqn{[0,1]}{}.
\end{Details}
\begin{Note}\relax
Files for all 182 districts in 1888 and other years are available at
\url{http://opr.princeton.edu/archive/eufert/switz.html}.

They state that variables \code{Examination} and \code{Education}
are averages for 1887, 1888 and 1889.
\end{Note}
\begin{Source}\relax
Project \dQuote{16P5}, pages 549--551 in

Mosteller, F. and Tukey, J. W. (1977)
\emph{Data Analysis and Regression: A Second Course in Statistics}.
Addison-Wesley, Reading Mass.

indicating their source as
\dQuote{Data used by permission of Franice van de Walle. Office of
Population Research, Princeton University, 1976.  Unpublished data
assembled under NICHD contract number No 1-HD-O-2077.}
\end{Source}
\begin{References}\relax
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
\emph{The New S Language}.
Wadsworth \& Brooks/Cole.
\end{References}
\begin{Examples}
\begin{ExampleCode}
data(swiss)
pairs(swiss, panel = panel.smooth, main = "swiss data",
      col = 3 + (swiss$Catholic > 50))
summary(lm(Fertility ~ . , data = swiss))
\end{ExampleCode}
\end{Examples}

