A demographic equation is a formula that measures population change. It estimates the increase or decrease in population by adding the number of births plus the net migration to the previous count, then subtracting the number of deaths.Know More
Demographic equations are used by businesses as well as political entities to estimate the natural increase of a specific population over a given period of time. They do not provide highly accurate results, but rather useful approximations. The net migration is determined by subtracting out-migration from in-migration of the population during that time period. The result is added to the previous count, plus births minus deaths, to give the new value.
Associated principles includes doubling time, which is the time required for a population to double assuming a constant growth rate. This is most accurately calculated by dividing the natural logarithm of two by the exponent of growth, but it can be more simply approximated by dividing 70 by the percentage of growth.
Another associated principle is zero population growth, which occurs when a population does not increase or decrease from year to year. This is the desired state of some political activists who feel that the current global population growth rate is unsustainable over the long term.Learn more about Population & Demography
The Weight-control Information Network allows users to compare body-mass index charts among races. Additionally, the Center for Disease Control compares BMI levels among socioeconomic groups.Full Answer >
There are five distinct demographic transition stages that are uniquely identified by birth and death rates. The first transition stage features high birth and death rates, causing a large fluctuation in population but with an overall small growth rate. The second stage sees a high birth rate paired with low death rates, which results in a rapid increase in total population.Full Answer >
Demographic groups include the generations known as Gen Z, Gen Y, Gen X and baby boomers. Demographic lifestyle parameters include factors such as geography, disposable income, housing, leisure activities, neighborhood, purchasing power, means of transportation and family status. Demographic information is available from the U.S. Census Bureau website.Full Answer >
The three most frequently studied demographic variables in the U.S. consumer market are age, gender and income level. Other variables that are frequently considered include education level, consumer occupation, family life cycle, social class, race and ethnicity. Demographic variables are associated with consumer needs and buying patterns.Full Answer >