Poverty and inequality persist in many regions of the developing world. This may be due mainly to an ineffective targeting of policies to address the root causes of poverty. Sustainable policy interventions are in need of reliable concepts of poverty and of a thorough understanding of the underlying mechanism that lead to such deprivation. The three essays of this book add to the debate concerning appropriate statistical tools in empirical development economics. The work proposes specific methodologies to analyze the extent of poverty and its underlying factors based on recent household surveys. The first chapter deals with a concept of poverty comparisons when panel data is at hand. The second chapter studies the determinants of spatial inequality using multilevel modelling. The third chapter analyzes the relation between a child's nutritional status and its survival probability.