EXHIBIT 99.223

                              Review of the Paper:
 Management of Multiple Congested Conditions in Unbundled Operation of a Power
                                     System

                                       by:

                            H. Glavitsch, F. Alvarado

This paper provides some good insights for the problem of congestion management
in power transmission networks in emerging energy markets. It is, however, very
impractical for real world application for the following reasons:

        1.      The paper assumes that market players will react perfectly and
                rationally to price signals derived based on generation costs
                and as such congestion would disappear. In reality, even if
                these market players were all "well intentioned," they could
                have technical/economic difficulty reacting to "optimally
                derived" price signals and the congestion would remain.

        2.      There are more than just short-run cost based prices that
                influence the market behavior. Other components of transmission
                price also would play an important role in how market
                participants would behave.

        3.      The solutions offered by the paper are strongly dependent on
                generator cost information that may not be available at all.

        4.      Paper's results, conclusions and contributions are strongly
                dependent on quadratic cost curves for generators. In reality,
                generator cost curves are not even quadratic. Furthermore, in a
                restructured industry, generators will be identified by their
                prices rather than costs (the price/capacity curve may take any
                shape).

        5.      Load management is completely ignored as a means of relieving
                congestion.

        6.      The paper allows certain generators to be excluded from
                redispatch. Depending on the system operating condition this may
                not be practicable.

        7.      The two iteration solution offered by the paper is completely
                impractical to implement.