The sample consists of 116 private Spanish firms (Table 1), including
both small and medium-sized firms (48.3%) and large firms (51.7%),
in accordance with the Recommendation of European Commission
(96/280/CE). Furthermore, various sectors and activities feature in the
survey (services, manufacturing industry, consultancy firms, transport,
education, aeronautics, chemical companies, information technologies,
energy and mines, metals, mechanics, among others).