Page 220 - Special Topic Session (STS) - Volume 3

STS541 Arturo B. E.
In particular, the master sample integrates the set of companies that have
a telephone number and / or web site, which according to the civil protection
authorities are located in the most vulnerable geographical regions affected
by a loss of character natural, whether earthquakes, hurricanes and / or floods.
The conformation of this sample is based on a general design that starts from
two levels of aggregation in which six particular statistical cuts are considered.
A. At the regional level:
• By company size
• By state
• By large sector
• By sector
B. At the federative level:
• By company size
• By large sector
For each possible scenario, the most vulnerable federal entities are
analyzed in the face of the onslaught of natural phenomena, which will allow
to capture the information of the entire affected group at a regional or
federative level, considering the statistical cuts of interest of between the set
immersed in the design and conformation of the master sample.
For the groupings by large sector and sector, the North American Industrial
Classification System (NAICS) 2013 is used.
The sampling scheme is probabilistic and stratified. Stratification is carried
out using the variable of total occupied personnel, according to the segments
published by the competent national authority.
Table number 1
Stratification according to the total number of occupied personnel
Occupied personnel range
Industry
Company size
(Construction and Trade Services
Manufactures)
Large 251 and more 101 and more 101 and more
Medium 51 - 250 31 - 100 51 - 100
Small 11 - 50 11 - 30 11 - 50
Micro 0 - 10 0 - 10 0 - 10

It is worth mentioning that the inclusion of companies in the master
sample is done by including the set of establishments that comprise them; this
is due to the fact that the specific studies require addressing the affected
regions and not the regions where the corporate or corporate matrices are
located.

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