The data are on the proportion of male birts in Denmark, The
Netherlands, Canada and the United States for a number of yeras.
Notice that the proportions for Canada and the United States are only
provided for the years 1970 to 1990, while Denmark and The Netherlands
have data listed for 1950 to 1994.
Usage
ex0724
Arguments
Format
A data frame with 45 observations on the following 5 variables.
Year
year of observation
Denmark
male birth rate of Denmark for given year
Netherlands
male birth rate of The Netherlands for given year
Canada
male birth rate of Canada for given year
USA
male birth rate of the United States for given year
References
Davis, D.L., Gottlieb, M.B. and Stampnitzky, J.R. (1998). Reduced
ratio of male to female births in several industrial countries,
Journal of the American Medical Association279(13):
1018--1023.