Too similar to combine? On negative weights in forecast combination

To combine or not to combine? A literature review of antidepressant combination therapy.

OBJECTIVE Treatment resistant depression is a common clinical problem and a major public health concern. The use of antidepressant combinations to overcome treatment resistance, while somewhat controversial, is a popular strategy in practice. This paper reviews published trials on combination antidepressants with a view to inform clinical practice. METHOD A systematic but selective review of ...

Density Forecast Combination

In this paper we investigate whether and how far density forecasts sensibly can be combined to produce a “better” pooled density forecast. In so doing we bring together two important but hitherto largely unrelated areas of the forecasting literature in economics, density forecasting and forecast combination. We provide simple Bayesian methods of pooling information across alternative density fo...

Forecast Evaluation and Combination

On vector partition functions with negative weights

We introduce the notion of weights into the vector partition function and the volume function associated to a sequence of vectors. We prove an explicit formula for the volume function with possibly negative weights. It is a generalization of a formula given by Brion and Vergne in [2].

On Unique Games with Negative Weights

In this paper, the author defines Generalized Unique Game Problem (GUGP), where weights of the edges are allowed to be negative. Focuses are made on two special types of GUGP, GUGP-NWA, where the weights of all edges are negative, and GUGP-PWT(ρ), where the total weight of all edges are positive and the negative/positive ratio is at most ρ. The author investigates the counterparts of the Unique...