Portuguese economy based on a administrative data set formally called the SISED data
set, but more commonly known as the Quadros de Pessoal (QP), which is gathered
since 1982 by the Portuguese Ministry of Labour and Solidarity and includes extensive
information on firms, establishments and workers, for 1982 to 2000 inclusive.
The data set covers all business units with wage-earners in the Portuguese economy that
have to fill annually a questionnaire referring to the month of March. The fill in of this
questionnaire is mandatory.
Probably the main strength of the data set concerns the amount of information it reports
and the number of units considered in the analysis as it cover most of private sector of
the economy.
The information gathered in Quadros de Pessoal data set is organised in three different
levels, firms, establishments and workers, each one covering specific information. The
three levels are matched, which gives this data set its linked employer - employee
nature, allowing for analysis in which both sides of labour market can be considered
separately.
At the firm level (the unit is the firm) there is information reported for name of the firm;
address of the firm; postcode; year of constitution; tax number; location - using
statistical codes for Distrito and Concelho; industry - 6-digit Portuguese classification
of economic activities (Firms are classified by main activity of the firm (that yields the
highest sales or the one involving more workers)); employment, including wage earners
and unpaid workers engaged in the firm during the last week of March, including those
on temporary leave; number of establishments; legal setting - type of organisation;
equity capital and % of private, public or foreign capital; and sales volume - yearly
sales.
At the establishment level (the unit is the establishment) the data covers information on
the address; location, (using statistical codes for Distrito and Concelho; industry, using
the 6-digit Portuguese classification of economic activities compatible with NACE rev.1
from 1995; and on employment, including wage earners and unpaid workers engaged in
the establishment during the last week of March, including those on temporary leave.
At the worker level (the unit is each individual worker) the data set reports information
on gender; age; professional situation; occupation, using the 5-digit Portuguese
classification of occupations; schooling - considering ISCED-compatible codes; tenure;