Is there empirical evidence for the cost of begging?

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Bibliographic Details
Title:	Is there empirical evidence for the cost of begging?
Authors:	Moreno-Rueda, Gregorio¹ gmr@ugr.es
Source:	Journal of Ethology. Nov2007, Vol. 25 Issue 3, p215-222. 8p.
Database:	Academic Search Ultimate

Description
ISSN:	02890771
DOI:	10.1007/s10164-006-0020-1