The safety index covers concerns about robberies, car theft, and other crimes, as well as the prevalence of drugs, property crime, violent crimes, and corruption and bribery.

Traffic Commute Time is self-explanatory but vital (as any commuter will testify). Purchasing power, cost of living, and property price to income ratio are all measures of the average citizen's financial wherewithal in a country, which connects directly to the standard of living. One of the most comprehensive equations is Numbeo's Quality of Life Index, which measures eight indices: purchasing power (including rent), safety, health care, cost of living, property price to income ratio, traffic commute time, pollution, and climate. However, this has given statisticians the opportunity to invent all manner of interesting equations, systems, and surveys that attempt the impossible task of boiling down quality of life (or on rarer occasions, standard of living) into a simple number. Because standard of living and quality of life are broad, but also slightly ambiguous terms, there is no universally agreed-upon technique for measuring them. It is closely related to (and often used interchangeably with) quality of life, which is generally understood to include the same measures of prosperity as standard of living, but also incorporate physical and mental health and wellness. Standard of living refers to the level of wealth, comfort, necessities, and material goods available to a particular geographic area.

Life by life