Before revision:  The paper reveals several conceptual and technical inconsistencies with the approaches taken in these articles, and in general concludes that none of the statements above either follows from or is required by the ]  no-arbitrage pricing theory .
After revision:  The review reveals several conceptual and technical inconsistencies with the approaches taken in these articles, and in general concludes that none of the statements above either follows from or is required by the ] no-arbitrage pricing theory .