. BSTJ 1: 2. November 1922: The Relation Between Rents and Incomes, and the Distribution of Rental Values. (Helmle, ). ICO 3CO4C0SC0 TOO /OOO 2OO0 DOLLARS ANNUAL INCOME 10 SO 30 40 50 70 ..1 4NNUAL VALUES IN POUNDS Fig. 5 98 BELL SYSTEM TECHNICAL JOURNAL detail or cumulative basis. This law does not hold for the lowerincome levels which may be best represented by a curve of approxi-mately hyperbolic form, as shown in Fig. 6. The same income dataare shown plotted on logarithmic probability paper in an insert on. 100 200 500 1000 2000 5000 10000 20000 50000 100000 Dollars Annual IncomeFig. 6
. BSTJ 1: 2. November 1922: The Relation Between Rents and Incomes, and the Distribution of Rental Values. (Helmle, ). ICO 3CO4C0SC0 TOO /OOO 2OO0 DOLLARS ANNUAL INCOME 10 SO 30 40 50 70 ..1 4NNUAL VALUES IN POUNDS Fig. 5 98 BELL SYSTEM TECHNICAL JOURNAL detail or cumulative basis. This law does not hold for the lowerincome levels which may be best represented by a curve of approxi-mately hyperbolic form, as shown in Fig. 6. The same income dataare shown plotted on logarithmic probability paper in an insert on. 100 200 500 1000 2000 5000 10000 20000 50000 100000 Dollars Annual IncomeFig. 6 Fig. 6. From the form of this curve it may be concluded that thedistribution of the lower two-thirds of both incomes and rents issimilar but that the spread of the higher incomes is much greaterthan the spread of the corresponding rents. RELATION BETWEEN RENTS AND INCOMES 99 Another comparison of incomes and rents may be made from asecond insert on the same chart. It may be readily demonstratedthat the normal curve of error plots as a parabola on semi-logarithmicpaper and the logarithmic skew curve as a parabola on double logar-ithmic paper. Two parabolas which represent extreme conditions ofspread and of concentration of rents in large cities are shown. Ifthe degree of dispersion remains fixed a change in the rent levelmerely shifts the parabola on the chart without changing its parabolic shape of rent curves and the hyperbolic shape of theincome curve indicate that rents are somewhat less conce
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfamilies, bookyear192
