Note on Edgeworth’s Taxation Phenomenon and Professor Garver’s Additional Condition on Demand Functions

  • Harold Hotelling


In a recent paper1 I derived for demand functions for n commodities conditions which, I concluded, assure the satisfaction of all further conditions which may reasonably be applied to all sets of demand functions. Letting p1, p2, … p n , and q1, q2, …, q n be respectively the prices and quantities, the conditions are:
$$\frac{{\partial {p_i}}}{{\partial {q_j}}} = \frac{{\partial {p_j}}}{{\partial {q_i}}} < 0,\frac{{\partial \left( {{p_i},{p_j}} \right)}}{{\partial \left( {{q_i},{q_j}} \right)}} >0,\frac{{\partial \left( {{p_i},{p_j}{p_k}} \right)}}{{\partial \left( {{q_i},{q_j},{q_k}} \right)}} < 0, \ldots$$
These are equivalent to
$$\frac{{\partial {q_i}}}{{\partial {p_j}}} = \frac{{\partial {q_j}}}{{\partial {p_i}}},\frac{{\partial {q_i}}}{{\partial {p_i}}} < 0,\frac{{\partial \left( {{q_i},{q_j}} \right)}}{{\partial \left( {{p_i},{p_j}} \right)}} >0,\frac{{\partial \left( {{q_i},{q_j},{q_k}} \right)}}{{\partial \left( {{p_i},{p_j},{p_k}} \right)}} < 0, \ldots ,$$
and were known, at least in part, by Edgeworth. Similar conditions in which the inequality signs are all > apply for supply functions.


Cost Function Similar Condition Empirical Result Political Economy Demand Function 
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Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • Harold Hotelling
    • 1
  1. 1.Columbia UniversityUSA

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