In "Feeding the Poor: Assessing Federal Food Aid", P.H. Rossi (1988) states that these gaps are often a result of unreliable tools or methods to measure nutrition risk, along with a lack of clarity in the definition of risk. In the study, Rossi took what are called "street-level bureaucrats" and applied them for WIC. These people were either at marginal or no nutrition risk, yet they were accepted easily into the WIC program. This practice essentially turns eligibility into solely a matter of income.