Over the years, the Bank has responded to changing country priorities in the social sectors by adjusting its lending program to the borrowing countries' ability and willingness to confront the social agenda. Social sector lending has been fairly consistent in terms of the proportional amount received by individual sectors. For instance, the biggest social lending sector is, by far, the sanitation sector. The second major social infrastructure sector in the IDB's lending has been urban development.
Education is the third major social lending sector.
It specifically applies the concept to the post-completion period , emphasizing the transition at the end of the loan period when the project is handed over to the borrower. Major Findings Sustainability of social projects rests on several pillars. First, projects should be integrated into national socioeconomic development programs which are fully supported by borrowing member countries. Social expenditures should also be carefully planned and budgeted, in terms of income generation, expenditures, and capital investments. Another important factor is involving beneficiaries in project development and execution so that they take ownership of such projects, use them, and become a force in their sustainability.