Measuring the non-observed economy. A handbook
The main focus of the Handbook is to provide guidance on how to produce exhaustive estimates of GDP. This means ensuring that as many productive activities as possible are observed, i.e., directly measured in the basic data on production, incomes, and expenditures from which the national accounts are compiled. It also means ensuring that non-observed activities are nevertheless accounted for, i.e., indirectly measured during compilation of the national accounts.
Resolution concerning statistics of employment in the informal sector
Adopted by the 15th ICLS (1993), this resolution provides technical guidelines as a basis for the development of suitable definitions and classifications of informal sector activities and the design of appropriate data collection methods and programmes, in the hopes such standards will enhance the international comparability of statistics.