  This chapter presents the Bilevel Optimization LIBrary of the test problems
(BOLIB for short), which contains a collection of test problems, with
continuous variables, to help support the development of numerical solvers for
bilevel optimization. The library contains 173 examples with 138 nonlinear, 24
linear, and 11 simple bilevel optimization problems. This BOLIB collection is
probably the largest bilevel optimization library of test problems. Moreover,
as the library is computationenabled with the MATLAB m-files of all the
examples, it provides a uniform basis for testing and comparing algorithms. The
library, together with all the related codes, is freely available at
biopt.github.io/bolib.
