Correction to: OR Spectrum (2021) 43:59–87 https://doi.org/10.1007/s00291-020-00605-w

In model (23)–(33) the constraints

$$\begin{aligned} X_{i,j,m}\ge \frac{p_{i,j,m}}{1-p_{i,j,m}} \cdot (Z_i + Y_{j,m} - 1) \quad \forall ~ i \in \mathscr {I};\, j \in {\mathscr {J}};\, m \in {\mathscr {M}} \end{aligned}$$
(26a)

are missing such that the results in Table 1 correspond to the model formulation. Note, if we ignore (26a), it may happen that the sum of the selection probabilities does not equal one, which may be justified by the fact that individual requests are rejected.