Dataset:  birthrate.dat

Source: R. Weintraub (1962). "The Birth Rate and Economic Development:
      An Empirical Study", Econometrica, Vol. 40, #4, pp 812-817.

Description: Birth Rates, per capita income, proportion (ratio?) of 
population in farming, and infant mortality during early 1950s for
30 nations.

Variables/Columns:
Nation   1-20
Birth Rate  22-25  /* 1953-1954 (Units not given)  */
Per Capita Income    30-33    /*  1953-1954 in 1948 US $  */
Proportion of population on farms   38-41 /*   Circa 1950  */ 
Infant Mortality Rate    45-49   /*  1953-1954  */