Given any observed demand behavior by means of a demand function, we quantify by how much it departs from rationality … correcting matrix that would yield a Slutsky matrix with its standard rationality properties (symmetry, singularity, and negative … semidefiniteness). A useful classification of departures from rationality is suggested as a result. Variants, examples, and …

underlying Slutsky matrix norm (SMN) and some popular discrete revealed preference (RP) measures of departures from rationality …, such as the Afriat index. We show that testing rationality in the SMN aproach with finite data is equivalent to testing it … under the RP approach. We propose a way to "summarize" the departures from rationality in a systematic fashion in finite …