TY  - JOUR
PB  - Elsevier
A1  - Bilancini, Ennio
A1  - Boncinelli, Leonardo
SP  - 13
Y1  - 2010///
IS  - 1
JF  - Economics Letters
VL  - 108
SN  - 0165-1765
N2  - We provide a necessary and sufficient condition for goods to be normal when utility functions are differentiable and strongly quasi-concave. Our condition is equivalent to the condition proposed by Alarie et al. (1990), but it is easier to check: it only requires to compute the minors associated with the border column (or row) of the bordered Hessian matrix of the utility function.
KW  - Normal goods; Bordered Hessian
TI  - Preferences and normal goods: An easy-to-check necessary and sufficient condition
AV  - none
UR  - http://doi.org/10.1016/j.econlet.2010.03.005
ID  - eprints3884
EP  - 15
ER  -