Hard to say, but the likelihood is that they were. Most 'blue chip' artists employ technicians that travel around the world to install and repair their work. Th

Hard to say, but the likelihood is that they were. Most 'blue chip' artists employ technicians that travel around the world to install and repair their work. This may be mediated through their dealer. I mention repair as a lot of contemporary art requires ongoing maintain, Julian Schnabel's employs full-time a team who trot around the globe repairing his famous plate portraits. Regardless, I would feel ethically responsible for anyone who installs my work. FYI: most exhibitions require that an artist define 'installation instructions'.