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Understanding economic access to essential needs and how this might be affected during climatic, health and economic shocks is critical to ensuring that vulnerable groups can lead a healthy and productive life. This technical report analyses the cost of essential needs in Cambodia by developing a Minimum Expenditure Basket (MEB) and calculating the expenditure gap of households most vulnerable to shocks, based on Cambodia Socio-Economic Survey (CSES) and WFP market price monitoring data.