3. Why is it that immigrants are now taking up the farms of New England which have, in some cases for years, been abandoned by native farmers? Is the fact that they are doing so an argument for or against the restriction of immigration? 4. What is the general tendency of immigrants in the matter of settlement in urban and rural communities? 5. If it is true that the relative decline of the agricultural population of the United States can be explained by the operation of purely economic forces, on what grounds is there justification for complaint as to the evils of concentration of population in cities? CHAPTER 26 PROBLEMS OF AGRICULTURAL ECONOMICS REFERENCES. _Carver, T. N._, Selected readings in rural economics. 1916. _Coulter, J. L._, Marketing of agricultural lands in Minnesota and North Dakota. A. E. Rev., 2: 282-301. 1912. _Goldenweiser, E. A._, The farmer's income. A. E. Rev., 6: 42-48. 1916. _Huebner, G. G._, Agricultural commerce: the organization of American commerce in agricultural commodities. 1915. _International Institute of Agricultural Statistics Year Book._ Monographs on agricultural coöperation in various countries. 1916. _Kemmerer, E. W._, Agricultural credit in the United States. A. E. Rev., 2: 852-872. *_Materials_, 407, 408, 409. _Metcalf, R._, and _Black, C. G._, Rural credit coöperation, and agricultural organization in Europe. 1915. _Olmsted, V. H._, The purchasing power of farm products. United States Dept. of Agric., Report, 1912. *_Phillips_, ch. XXVII. On agricultural credit. _Powell, F. W._, Coöperative marketing of California fresh fruit. Q. J. E., 24: 392-418. 1909-1910. _Putnam, G. E._, Agricultural credit legislation and the tenancy problem. A. E. Rev., 5: 805-815. 1915. _Putnam, G. E._, Farm credit in Kansas. Ibid., 27-37. 1915. _Putnam, G. E._, The federal rural credit bill. Ibid., 6: 770-789. 1916. _Shaw, A. W._, Some problems in market distribution. Q. J. E., 26: 703-765. 1911-1912. *_Source Book_, 34-47, 48-57, 75-80, 81-90. _Warren, G. F._, Farm management. 1913. (Treats primarily the problem of the individual farm, but also many of the broader economic questions.) _Weld, L. D. H._, The marketing of farm products. 1916. QUESTIONS. 1. Why has the corporate form of business organizations not been as extensively introduced into the farming industry as into other industries?