capm & mkt model....

just want to make sure am on the rite track… E® calculated from the capm is equivalent to that calculated from the mkt model …and variables from one model can be used as subsistute in the other correct?

maybe. i believe the market model is used to ascertain the beta that is used in the CAPM.

how can that be true if the capm and market model have different inputs. market model doesnt use a risk premium.