The sharp reduction of extreme poverty worldwide and improvement to living standards in the last 20 years are remarkable and imply that a large number of people in developing countries are able to afford more than their minimum subsistence. However, without adequate protection mechanisms, this progress remains fragile and can easily be reverted, as seen by the devastating socio-economic effects of the COVID-19 pandemic restrictions and disturbances to the economies. Households situated just above the poverty line remain vulnerable, which points to the evident need for continuous public support to secure their position out of poverty. However, as income increases sufficiently to exit extreme poverty, households' preferences shift and their strategies to fulfill their basic needs as well. These modifications have implications for the design of appropriate support programs, to help individuals stabilize and improve their quality of life, but also encourage sustainable choices.This dissertation expands knowledge on mechanisms of household consumption and fulfillment of basic necessities, at various levels of income. Specifically, food and energy consumption are examined, as they are evidently required for basic human development and well-being, but their consumption patterns change noticeably with income, to better quality diets and to modern energy sources respectively. Accounting for these changes is a condition for the success of interventions to secure decent living standards and sustainability. Specifically, the four essays of this work provide illustrations for rural populations of selected Asian countries and considers the choice of income versus non-income forms of support under different settings.In particular, essay 1 examines the changing preferences of households for home-produced food over market purchases at various income levels. A theoretical framework places this arbitrage under the constraints of minimum food and minimum cash requirements to be fulfilled for survival. A nonlinear relationship appears between the share of home food in total food expenditure and income. Therefore, contrary to the view that home food is associated with subsistence, the share of home-produced food does not always shrink with better incomes.Using data from rural India, a semiparametric analysis shows the pattern is stronger for households whose main activity is not farming. Analysis of market changes or policy intervention on food consumption patterns should acknowledge that higher home-food consumption may not always represent a sign of impoverishment.