90 



BELL SYSTEM TECHNICAL JOURNAL 



The second of these two tables represents average conditions for 

 Great Britain. 



Rent Distributions 



In making comparisons of survey rent data it is desirable to dis- 

 tinguish differences in price levels as they afTect rents, difTerences 

 in economic grade of the population, and differences in the distri- 

 bution of families about their average grade. Failure to take account 

 of these three factors will result in misleading impressions, which may 

 be illustrated by summaries from successive surveys in Atlanta. 

 The following table shows composites of private residences, flats and 

 apartments: 



TABLE VII 



It might be inferred from this set-up that the condition of the 

 poorer families had been very much improved or that the average 

 family had attained a higher condition of well-being. It will be 

 shown later that there was no material change in the distribution of 

 rental values about an average rent when rents are considered as 

 percentages of that average, and it is probable that the principal. 



