The Fertility Decline in Mexico, 1990-2009. Exploration through Census and Administrative Data

The aim of the study is to show the reduction in fertility from 1990 to 2010 in Mexico, by analyzing two important sources of information: Census of Population and Birth Certificates from administrative data.
First we will show through Birth Certificates how fertility has shown a reduction in the period, both in the Global fertility Rate and in Specific Fertility Rates too. We will present two sets of data, one calculated from the year of registration of birth using three years of information, and another from the age record, using up to thirty five months. We want to show by this, that both calculations produce similar information, and that using the age of registration gives opportunity, because we do not have to wait too much to have data.
On the other hand, we will present data from the 1990, 2000 and 2010 Population Census, and we calculate fertility by direct (using the question of last live birth) and indirect methods (the own children method). We can compare the information obtained directly and indirectly, demonstrating that is relevant in both ways, to estimate fertility through Population Census.
In both cases we use the information from specializing surveys in fertility to compare the results that we produce.