They developed consistent, longtime terms of their collaboration. They together imagined projects, for which Christo would create sketches and preparatory works that were later sold to fund the resulting installation. Christo and Jeanne-Claude hired assistants to do the work of wrapping the object at hand. They originally worked under the name "Christo" to simplify dealings and their brand, given the difficulties of establishing an artist's reputation and the prejudices against female artists, but they would later retroactively credit their large-scale outdoor works to both "Christo and Jeanne-Claude". They eventually flew in separate planes such that, in case one crashed, the other could continue their work.