A study of the principles of self-service, their ap- 

 plication to the retail distribution of foodstuffs, and 

 the results obtained through their application, neces- 

 sitated a close cooperation between the Bureau of 

 Markets and the operators of self-serve grocery 

 stores. Almost without exception the retailers from 

 whom information was requested evidenced a keen 

 desire to cooperate with the bureau. 



Special acknowledgment is due to the managing 

 director of the Duffy-Powers Co., Rochester, N. Y., 

 for his personal aid and his generosity in granting 

 the bureau practical^ unlimited use of the self- 

 serve grocer}^ department of the company for in- 

 vestigational and experimental purposes. 



Other stores and organizations cooperating with 

 the Bureau of Markets in this study w^ere : Hillman's, 

 Chicago, 111.; Libert^^ Market, Indianapolis, Ind.; The 

 Groceteria, St. Paul, Minn.; Piggly-Wiggly, Memphis, 

 Tenn.; L. S. Ayres & Co., Indianapolis, Ind.; Acme 

 Stores Co., Los Angeles, Calif.; The Emporium, San 

 Francisco, Calif.; Bay Cities Mercantile Co., Santa 

 Monica, Calif. ; Groceteria Stores Co., Seattle, Wash. ; 

 Gerard Grocery Co., Pomona, Calif.; U-Save Stores 

 (Inc.), Cambridge, Mass.; and bureau of business re- 

 search of the graduate school of business adminis- 

 tration of Harvard University. 



