Page 117 - Contributed Paper Session (CPS) - Volume 6

CPS1839 Bahija Nali et al.
of darkness” and their inability to reconstruct the functioning of the economy
by integrating their results, especially for developing countries, which are
characterized by a very particular economic reality.
The search for exhaustiveness is an inherent feature of national accounts,
which seeks rather to make as full use as possible of all available basic data
and to use models only at the most disaggregated levels of the national
accounts. It compares basic data with one another, interprets discrepancies,
makes estimates of unobserved or unregistered activities, and uses specific
surveys to measure their magnitude. Above all, it adopts an analytical
approach which consists of identifying the various kinds of the non-observed
economy and studying the extent to which some of these activities are already
taken into account and how to evaluate the shares of those that are not yet
taken into account by the usual methods.
The approach we are presenting is based on a local reality, where the
unregistered “activities” occupy an important place. In such a context,
embracing the entire productive space across production units proves difficult,
since these tend to conceal a part of their productions. We will use labour
input method which aims to approach the productive world through the
labour factor, which is the best known factor of production, as reported by
households in Labour Force Survey (LFS).
This approach is based on the most analytical work possible. First, it
involves the production of a Labour supply matrix (demographic matrix) to be
confronted with another matrix that represents the use of labour by employers
(economic matrix) to reach, finally, a unique matrix of labour input (jobs’
matrix), able to put production in relation with the workforce that gave birth
to it. The objective is to capture the employed population not observed or not
traced by economic surveys and to assign an output to it. The output thus
calculated is then integrated into an iterative data analysis and arbitration
process proposed by the central framework of the national accounts system
in order to achieve an exhaustive and integrated measure of national GDP.
Our work consists in the compilation, for a benchmark year of national
accounts, of a single jobs’ matrix by status in employment (employee,
employer, Own-account worker and contributing family worker) and by
industry (International Standard Industrial Classification ISIC).
The development of this matrix is carried out in three stages: the first two
levels correspond to statistical arbitrations between the supply and use of
labour matrixes already prepared. And the last stage aims to provide the
elements and indicators needed for the calculation of the output generated
by hidden labour.

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