Many these questions were asked long ago and got no answers. I think they can be answered on Quant Stack. Migrate them there?
https://economics.stackexchange.com/search?q=%5Basset-pricing%5D+answers%3A0
https://economics.stackexchange.com/search?q=%5Bfinance%5D+answers%3A0
https://economics.stackexchange.com/search?q=%5Bfinancial-economics%5D+answers%3A0
https://economics.stackexchange.com/search?q=%5Bfinancial-markets%5D+answers%3A0
https://economics.stackexchange.com/search?q=%5Bblack-scholes-model%5D+answers%3A0