universal among richer families. Such families easily access personal or home information and entertainment technology. Personal computers, reliable and private access to the Internet, cellular telephones, and entertainment technologies are common and form the basis of better connections to news, information, and public opinion. Richer families have a considerable political voice through their ability to make contributions to political parties, to be informed about current affairs, and to participate in debate.
The subnet identifiers within a network are assigned according to the network’s subnet mask, which is a binary pattern that is used to determine how many subnets are available in a network. In its binary form, a subnet mask begins with a series of ones and ends with a series of zeros. However, subnet masks are usually expressed using the familiar dot-decimal notation used for IP addresses and network prefixes. In this notation, the series of ones become the number 255. For example, the most common subnet mask expressed using this notation is . This subnet mask is known as subnet zero, and it is used when only one subnet is required or as the first of multiple subnets.
In the 1990s, P. Davis et al. published New Zealand Socioeconomic Index of Occupational Status ,  known as NZSEI. It was based on a 'returns to human capital' model of the stratification process and originally used data from the 1991 New Zealand Census (n=1,051,926) to generate scores for 97 occupational groups. It was later updated using 2006 Census data.  NZSEI is a linear scale of ranked occupation, produced using an algorithm involving age, income and education, and aggregated to six discrete groupings (called Socio-economic Status , SES) to enable comparison with E-I and ISEI.