Market To Book Value Formula

ch_client = “intellimon”; ch_width = 468; ch_height = 180; ch_type = “mpu”; ch_sid = “Chitika Premium”; ch_backfill = 1; Return on Equity question?

Is the denominator of the ROE formula the book value of shareholders equity? or is it the market cap of the company which I believe to be the “equity” of [...]