Eurostat Methodologies and Working Papers. Available from http://ec.europa.eu/eurostat /documents/3859598/5910217 /KS-RA-09-012-EN.PDF /Oldl 733e-46b6-4da8-92e6 -766a65d7fd60?version=l .0 (accessed 4 August 2017). Statistics on environmental protection and resource management expenditure for corporations, non-profit institutions and households usually require the use of specific surveys of establishments in different sectors and industries. Therefore, key factors that affect the quality of statistics produced through this type of source include the existence of updated and precise establishment registers, sampling procedures and the quality of questionnaires.