1845.3 Assessment
Research Question (Clear, unambiguous) Do non-whites have higher incomes in racially diverse neighborhoods?  Question not expressed clearly enough.  
Relevant Literature Articles mentioned are relevant, but a bit dated, not clear where to go from here.
Causal Interpretations (clear, all parts defined, mechanisms, controls, plausible) What is meant by diversity, what are the relevant geographical areas, even what economic standards to use are all rather unclear.  The causal logic linking diversity to income potential is not only unclear, but doubtful.  Confuses residential neighborhoods with areas of economic activity providing jobs, often distinct and separate.  
Data (variables, sample, comparison) Not obvious that the GSS is a good data set for this.
Research Value Research defense is weak.  No reason to believe that showing a relationship between diversity and employment opportunities would make diversity a reasonable strategy, both because such a relationship all too likely spurious (diversity is not a random event), and producing diversity is not likely to be a practical strategy.
Overall The questionable causal logic here creates doubt about the viability of this project idea, along with potential problems about availability of data.