Discussion.

Comments on several articles about demography which appeared in the March 1980 issue of `The Journal of Economic History.' Applicability of the Malthusian model to explain the economic and demographic trends in Ireland in the prefamine period in the 19th century; Analysis of the fertility rates of white families in Philadelphia, Pennsylvania from 1850-1880; Contribution of interregional migration to the elimination of labor market disequilibrium during the American Civil War.