This is why I've seriously questioned the self proclaimed "creative genius" tag Kanye West continuously spouts, because it's hardly discussed by many hip hop pundits that he basically "collaborates" with numerous artists & producers in order to bite their concepts, rhyme styles & lyrics.
But maybe in some twisted way, utilizing other peoples talents for your own benefit & gain is where the real "genius" lies.
What confuses me is that he obviously has no issues about crediting people. Did that change? I don't know about writer credits (which obviously can include producer names too), but as far as producer credits, on College Dropout the only outside producers were Evidence and Brian Miller.
On Late Registration it started creeping up. You had Just Blaze, Kanye's cousin Devo Springsteen, and then obviously Jon Brion co-produced most of the album and brought in live music, etc.
Graduation was similar, but most of the outside production was Just Nottz and Toomp doing their thing. 808's too.
MBDTF is where is started getting crazy with the amount of co-production, and Mike Dean was everywhere. Was it when Kanye met Mike Dean? MBDTF is definitely where he started adding writer credits as well as production credits. Maybe that's it?
On MBDTF, WTT, and Yeezus, the names are through the roof.