### Description of the issue or change proposal Reminder: Adapt the new notebooks to the changes in PR https://github.com/DoubleML/doubleml-docs/pull/73 * R and python notebook for A/B example: https://github.com/DoubleML/doubleml-docs/pull/75 * Preprocessing file required for demand elasticity example : https://github.com/DoubleML/doubleml-docs/blob/p-add-demand-data-preprocessing/doc/examples/py_elasticity_preprocessing.ipynb * Depending on the time of the PR https://github.com/DoubleML/doubleml-docs/pull/73 this might also involve adjusting the analysis notebook for demand elasticity estimation ### Comments, context or references Changes required due to PRs https://github.com/DoubleML/doubleml-docs/pull/73, https://github.com/DoubleML/doubleml-for-py/pull/151 and https://github.com/DoubleML/doubleml-for-r/pull/161