This paper discusses the factors that are defining for the of human capital level. The study is based on time series. The regression function are represented for the main factors of human capital. In the future, these regressions used to predict the human development index. Some dependencies provide the possibility of scientific prediction; the time period makes it possible to verify. The functions typology is performed on the basis of regression types and determination coefficients. Some factors considered for groups of countries that use the same social model. The paper discusses the Continental and Scandinavian social model.