Abstract: According to one embodiment, a prediction device includes: first processing circuitry and second processing circuitry. The first processing circuitry corrects a demand result value on a particular date on a basis of an adjustment coefficient depending on the particular date; and generates a prediction model of a demand on a basis of the corrected demand result value on the particular date and a demand result value on a non-particular date. The second processing circuitry calculates a demand predicted value on a date of a prediction target on a basis of demand result values on one or more dates, an adjustment coefficient depending on a particular date among the one or more dates, and the prediction model. The second processing circuitry inversely corrects the demand predicted value using an adjustment coefficient depending on the date of the prediction target if the date of the prediction target is a particular date.

Abstract: A bid-price determination apparatus includes an acquirer, an extractor, a predictor, a determiner, and an output device. The acquirer acquires a price history of a product before a current time in an electric power continuous session. The extractor extracts, from the acquired price history, a first feature quantity which is a feature quantity of the price history of the product. The predictor predicts, based on the extracted first feature quantity, a second feature quantity which is a feature quantity of price changes of the product after the current time. The determiner determines, based on the predicted second feature quantity, a transaction standard value which is a standard for a transaction of the product after the current time. The output device outputs the determined transaction standard value.