850 ITU‐T's Technical Reports and Specifications Table C.1 – City Prosperity Index Dimension Definition/variables Productivity The productivity index is measured through the city product, which is composed of the variables capital investment, formal/informal employment, inflation, trade, savings, export/import, and household income/consumption. The city product represents the total output of goods and services (value added) produced by a city's population during a specific year. Quality of life The quality of life index is a combination of four sub‐indices: education, health, safety/security and public space. The sub‐index education includes literacy, primary, secondary and tertiary enrolment. The sub‐index health includes life expectancy, under‐five mortality rates, HIV/AIDS, morbidity and nutrition variables. Infrastructure development The infrastructure development index combines two sub‐indices: one for infrastructure and another for housing. The infrastructure sub‐index includes: connection to services (piped water, sewage, electricity and ICT), waste management, knowledge infrastructure, health infrastructure, and transport and road infrastructure. The housing sub‐index includes building materials and living space. Environmental sustainability The environmental sustainability index is made of four sub‐indices: air quality (PM10), CO2 emissions, energy and indoor pollution. Equity and social inclusion The equity and social inclusion index combines statistical measures of inequity of income/consumption (Gini coefficient) and social and gender inequity of access to services and infrastructure. There is also an extended \"City Prosperity Index\" with more indicators and a plan to include governance as a sixth dimension. Furthermore, a specific work has been made on Streets as a driver for prosperity, available at: http://www.unhabitat.org/pmss/listItemDetails.aspx?publicationID=3513.