532011 5970 Ito Nobuhiro In Marshall s Principles of Economics, the relationship between Book V, equilibrium theory and Book VI, distribution theory has not been well-investigated. This paper aims to reexamine Marshall s theory of monopoly and present an interpretation that his defense of monopoly is closely related to the idea of economic chivalry. Marshall shows that a monopolistic firm considers consumers surplus and does not pursue profit maximization in the short run. A study of economic chivalry in Book VI is essential to understand behaviour of monopolistic firm in Book V. 1907 18981907 constructionmarshall1920 1890p.324
532011 2010 14 Expenses of production 2007
Monopoly PriceMarshallMarshall1881 1879p.180 Cost of Production effortsabstinencesmarshallmarshall18811879p.73 MarshallMarshall18811879p.74c. f. Marshall19201890p.339 Marshall1920p.484 Marshall1920p.484 100010 Marshall1919p.168
532011 2010 Marshall1920p.485 14 48034 DD SS Ox DD Schumpeter19501942p.82
19201890480 SS P 1P 2 MP 3P 2P 1 P 3 P 3 QQmonopoly revenue curve QQ q 3 Ox Lq 3 OLLq 3 q 3 OL Lq 1 Lq 2 q 1q 2 Lq 3 OL OL Lq 3 constant revenue curves OX OY 3422 y = f 1(x) y = f 2(x)xf 1(x) - xf 2(x) average revenue curve of a seller Robinson1933p.21 21 Marshall19201890p.855
532011 Marshall19201890p.856 y x z xy xz MarshallMarshall18811879p.181n 34 z(x) f 2(x) Marshall19201890 p.856 Marshall19201890p.374 Marshall19201890p.346 Marshall monopoly net revenue areas Robinson1933p.54n
19201890p.805 34 Marshall19201890p.457 34 xf 1(x) - xf 2(x) q 3 x 180 34 OL q 1 10 q 1 11 SS 34 q 1 10 34 11 34SS
532011 34 SSDD Marshall19201890p.485 Marshall1919pp.405-406
Marshall19201890p.487 Marshall1919p.406 Marshall1919p.406 13 12 Marshall19201890p.510 12 Marshall1907 Marshall1920 1890p.719
532011 13 13
14 Marshall, A.1907Social Possibilities of Economic Chivalry in Memorials of Alfred Marshall, ed. by Pigou, A. C. 1925, pp.323-346. 1991 1919Industry and Trade.1986 1920 (1890)Principles of Economics: An Introductory Volume, 8th edition. (1st ed. 1890). 1985 1961Alfred Marshall Principles of Economics Ninth (Variorum) Edition with Annotations by C. W. Guillebaud, Volume II Note. Marshall, A.Marshall, M. P.1881 (1879)Economics of Industry, 2nd edition. (1st ed. 1879). 1985 Robinson, J.1933The Economics of Imperfect Competition. 1956 14
532011 Schumpeter, J. A.1950 (1942)Capitalism, Socialism and Democracy, 3rd edition. (1st ed. 1942). 1995 2007 20105389-102