Demand-side bidding (DSB) provides a very flexible way of meeting the peak
load in a production schedule. This paper demonstrates that, in a competiti
ve electricity pool, DSB and other forms of flexible generation can cause s
harp and unwarranted price increases if the production schedule is establis
hed on the basis of a minimization of the total production cost. Furthermor
e, the competitiveness of DSB is artificially inflated if the load recovery
periods which accompany these load reductions are not taken into considera
tion by the scheduling program. It is argued that the actual value of DSB s
hould be re-examined in the light of these findings.