LifeCycleSavings          package:datasets          R Documentation

Intercountry Life-Cycle Savings Data

Description:

     Data on the savings ratio 1960-1970.

Usage:

     LifeCycleSavings

Format:

     A data frame with 50 observations on 5 variables.

       [,1]  sr     numeric  aggregate personal savings
       [,2]  pop15  numeric  % of population under 15
       [,3]  pop75  numeric  % of population over 75
       [,4]  dpi    numeric  real per-capita disposable income
       [,5]  ddpi   numeric  % growth rate of dpi

Details:

     Under the life-cycle savings hypothesis as developed by Franco
     Modigliani, the savings ratio (aggregate personal saving divided
     by disposable income) is explained by per-capita disposable
     income, the percentage rate of change in per-capita disposable
     income, and two demographic variables: the percentage of
     population less than 15 years old and the percentage of the
     population over 75 years old. The data are averaged over the
     decade 1960-1970 to remove the business cycle or other short-term
     fluctuations.

Source:

     The data were obtained from Belsley, Kuh and Welsch (1980). They
     in turn obtained the data from Sterling (1977).

References:

     Sterling, Arnie (1977) Unpublished BS Thesis. Massachusetts
     Institute of Technology.

     Belsley, D. A., Kuh. E. and Welsch, R. E. (1980) _Regression
     Diagnostics_. New York: Wiley.

Examples:

     require(stats); require(graphics)
     pairs(LifeCycleSavings, panel = panel.smooth,
           main = "LifeCycleSavings data")
     fm1 <- lm(sr ~ pop15 + pop75 + dpi + ddpi, data = LifeCycleSavings)
     summary(fm1)

