Table 3 A counterexample to show imperfection of mean-variance model
From: Comparing validity of risk measures on newsvendor models in open innovation perspective
|  | ω 1 | ω 2 |
|---|---|---|
ϕ 1 | −1 | 3 |
ϕ 2 | −1 | −1 |
From: Comparing validity of risk measures on newsvendor models in open innovation perspective
|  | ω 1 | ω 2 |
|---|---|---|
ϕ 1 | −1 | 3 |
ϕ 2 | −1 | −1 |