Strategic bidding problems are becoming key issues in competitive electricity markets. This paper applies bilevel optimization theory to deal with this issue. We first analyze generating company strategic bidding behaviors and build a bilevel optimization model for a day-ahead electricity...

The performance of dichotomous and polytomous IRT models in equating testlet-based tests was compared in this study.To clarify the conditions under which dichotomous and polytomous item response models produce differing results, the DIMTEST program was used for testing essential...