Every manager, up to the president of the company, must handle some phases of staffing, even though personnel may provide at least technical help in every case... Again, the personnel department seldom makes the final decision on selection, except in cases where large numbers of people must be hired at one time and the line managers would not have the time to interview them all. More commonly, even in the case of rank-and-file employees, it merely screens the applicants and picks out a few whom it considers the most promising. Then the immediate supervisors make a choice among these few.

p. 410 - Management: theory and practice, 1965