TY - JOUR AU - Ferri García, Ramón AU - Rueda García, María Del Mar PY - 2020 UR - http://hdl.handle.net/10481/62534 AB - Modern survey methods may be subject to non-observable bias, from various sources. Among online surveys, for example, selection bias is prevalent, due to the sampling mechanism commonly used, whereby participants self-select from a subgroup whose... LA - eng PB - Public Library of Science TI - Propensity score adjustment using machine learning classification algorithms to control selection bias in online surveys DO - 10.1371/journal. pone.0231500 ER -