The PwC Golden Age Index assesses how well OECD countries, particularly the UK, adapt to an older workforce by measuring indicators such as employment rates and training for workers aged over 55. While the UK improved its performance, it ranked 19th among OECD countries by 2013, with potential GDP growth of £100 billion if it matched Sweden's employment rates for older workers. Recommendations include policy reforms to encourage older worker participation and adjustments to business practices for better integration of older employees.