Social capital is a relatively new concept which has attracted significant attention in recent years. No consensus has yet been reached on how to measure social capital, resulting in a large number of different tools available. While psychometric validation methods such as factor analysis have been used by a few studies to assess the internal validity of some tools, these techniques rely on data already collected by the tool and are therefore not capable of eliciting what the questions are actually measuring.

Abstract: In Vietnam there is growing concern about the potential social impact of rapid economic change. The extent and type of social connectedness within communities, or social capital, may be changing. Studies from other developing countries have demonstrated that social capital is often independently associated with various indicators of well-being, including such aspects of human capital as health and education.

Although primary school enrolment in Vietnam is high (91 per cent), most primary school students receive little more than half the annual teaching time defined by international norms. The Vietnamese school year is short by international standards, covering only 33 weeks. In addition, only around 20 per cent of children in Vietnam receive a full-day of schooling (5 or 6 hours according to international standards).

Extra classes are increasingly observed in both developed and developing countries. In Vietnam, a country where education reforms are at their height, extra classes are proliferating and have become a concern to society and the government. Although the government has banned extra classes that are independent of school administration, teachers often run home-based classes to supplement their income.

Increasingly, academics and researchers working on poverty issues recognise that poor people's own experiences and opinions should be heard. However, it is not just a question of encouraging participation. More attention needs to be paid to the ethics of research reciprocity –ensuring that participating communities are part of the research process and help shape the findings and recommendations that flow from it.