The UK Investment in Intangible Assets Survey (IIA Survey) was launched in 2009 and explores the level of spending and life lengths of private sector investments in intangible assets. The survey was discontinued following the 2010 survey. The survey is distinctive from other surveys measuring intangible assets, such as the UK Innovation Survey, in terms of three main features. First, the survey covers expenditure on a wider range of intangibles, including training, software, branding, design and business process. Second, the survey asks firms about both purchased and in-house expenditure. Third, in order to estimate depreciation rates, the survey also asks about the length of time firms expect to benefit from spending on intangibles.