However, the GMO location register is not linked with the ALK and has only very limited options for cartographic visualisation, i.e. it is only possible to map the cultivation of Bt-maize at the level of municipalities in terms of density maps [37].
Although the majority of the projects (around 97%) take place at the level of municipalities, in some cases they refer to the higher administrative levels of provinces or regions.6 In these cases, we re-allocated the spending to the municipalities on the basis of the 2007 population.
These data were provided by farmers, scaled at the level of municipalities, and updated in 2000.
The cut-off for high levels was set at the 85th percentile of the respective empirical distribution at the level of municipalities.
2 It, therefore, seems likely that to fully exclude confounding due to place the authors might need to match to the level of municipalities and not just counties.
For demographic and climatic variables, 3 categories were defined using the 15th and 85th percentile of their empirical distributions at the level of municipalities.
Of these participants, 2280 individuals living in rural areas of KORA and SHIP were excluded from the sample because they could not be assigned to spatial units below the level of municipalities; hence our study was limited to urban areas.
For the site visits, which took place in the following week, the evaluation team has developed a set of criteria for representative sample selection based on typology of services and service providers, rural/urban regional balance, territorial distribution and development level of municipalities.
Specifically, in our study it is impossible to determine with certainty if the individuals who experienced the outcome, in this case death from cardiovascular disease, were under FHP coverage, because the only information available is at the aggregate level of municipalities.
Alves and Belluzzo [ 18], for instance, define a health production function (proposed by Becker and Lewis [ 19]), and find, for the period between 1970 and 2000, that education, sanitary services and higher per capita income are associated with lower infant mortality at the level of municipalities.
