 This Nielsen defined area has a higher ownership of televisions per household anywhere in the country due to its relative economic prosperity as compared to other areas in the country.Radio ratings agency Radio Research Council (provided by KBP) also provide measurement of audience ratings.The stricter Nielsen definition closer reflects the built-up area surrounding Manila than the PIA definition, Yet even the Nielsen definition of Mega Manila cannot be merely equated to the built-up area; the Nielsen definition includes significant undeveloped forested areas, while completely excluding contiguous developed settlements in such places like northern Batangas.