My specialization is in development and agriculture economics, poverty measurement and vulnerability to poverty, welfare, education, ethnic minorities, impact evaluation, experiemental economics, survey design and survey management, project design. I have been the team leader for many large scale impact evaluation research related to development projects on variety of subject, including poverty reduction, education, consumer behavior, infrastructure, water and sanitation, health care, micro credit, REDD+, household welfare and nonfarm household business. I have also designed sampling, questionnaire and managed large scale household surveys in Vietnam, including Vietnam Living Standard Survey, Vietnam National Health Survey, and Baseline Survey for 135 Phase II, Northern Upland Poverty Reduction Phase II. Some of my works have been published in international peer-reviewed journals such as the American Economic Journal, Journal of Health Economics and World Development ....