Others have said CDBG 's scope of allowed activities is too broad , making it difficult to measure program performance .
Some researchers argue that because CDBG is a bottom - up program it is significantly more successful than previous programs .
Others have said program 's scope of allowed activities is too broad , making CDBG difficult to measure program performance .
Some researchers argue that because CDBG is a bottom - up program it is significantly more successful than previous programs .