The mining extraction occupies an important place in Democratic Republic of Congo. It is an economic activity that touches some thousand of Congolese. In the North-Kivu Province, to the occurrence, the mining exploitation is a source of the essential incomes for a few hundreds of the thousands of families. Thus, in Masisi territory, the casual artisanal mining exploitation uses more 3000 young, of which a big number comes of other regions in search of a permanent or seasonal use. While undertaking this survey, we wanted to detect the different dark ways in which left the income of these mining products of our object of survey and to measure the level of investment, of saving as well as the mind of initiative in relation to the creation of other units of production of the population of Rubaya. To harvest the data the technique of the questionnaire as well as the methods statistical, inductive and comparative us useful summer. Also, the software packages Eviews 3.1 and SPSS 16.0 allowed us to make analyses économétriques of the survey. The results show that the mining extraction of Rubaya doesn't constitute the main activity for the population of Rubaya because we found that there is also the mining operators who exercise other activities such as : trade, agriculture, raising and the salaried work. The impact of the artisanal mining exploitation on the life style of the creuseurs of Rubaya is positive according to the found results. We met that so much Didgers don't consume all of their income, but on the contrary, they also save as investment.

The tie between economic growth and system of education seems sufficiently established to collect a large consensus of the economists. The profits of the education go well beyond their contribution to the human capital in the production of goods. To shortcoming this survey carrying on the" role of the woman's education: Arbitration between work and fertility", it was question to understand the interrelations between the woman's education, the use and the fertility in urban environment, and more especially in the city of Goma. The data have been collected with the help of a questionnaire and the results have been analyzed thanks to the methods statistical, inductive and comparative. To this effect, the software packages Eviews 3.0 and Sphinx Plus allowed us to make econometric analysis of the survey. After the analyses, we noted that the elevated instruction level pushes the woman to look for a salaried job (rather than to remain in the domestic works). With regard to the influence of the woman's education on the wanted births, it is little meaningful. It would be useful for the state to take some measures in terms of policies and strategies in view of to control well and to master the dynamics of the populations. To this consideration, let's signal that the demographic explosion has some ties with the poverty of the countries of the South. With regard to the households, the awakening of conscience concerning education and fertility can contribute to the improvement of their life conditions.