Christensen (2014) examines in an article of this Journal the endogeneity biases which characterize a majority of monetary households' expenditures. The estimation of full expenditures, integrating monetary expenditures and time use for domestic activities, allows taking fully into account the role of prices and the complementarities between monetary and time expenditures. The results show the importance of integrating domestic production to households' market activities in an interpretation of these endogeneity biases on cross-sectional consumption surveys.