Is this properly accounting for the regional pricing differences of "good girls" and "bitches"? Lil Wayne has lived in a sprawling mansion in Miami, but also now lives in New Orleans. Are we just supposed to accept at face value that the costs are fixed across both localities?
Additionally, Kanye appears to be referencing wholesale costs of "bitches" as he's talking about getting them in quantities of 1000, while Lil Wayne is clearly buying in retail prices at only 12 "bitches" at a time.
There's too many inconsistencies to determine objective pricing from the data provided.
Possibly, but it may be high risk. I'm certainly no authority on the subject, however Jay-Z, with a net worth of $2.6 Billion ( source ) doesn't seem to think its worth the risk.
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He told us "I got ninety-nine problems, but a bitch ain't one".
A cross-sectional study would likely yield some short term answers, but the real work will require a longitudinal study to tease out trends in different regions and possibly even impacts from seasonality to take into account price fluctuations and determine volatility. This is well beyond my resources, but the grant application almost writes itself.
There may be parallels that could be learned from examining the price spike in the prison economy during April 2009.