DEMOGRAPHY
- is the study of human population
- presents population data into a systematic manner
- fundamental in designing and implementing population
management program and other development programs
3. SAMPLE SURVEYS
- uses sample of the target population to produce estimates
- may be conducted for the national of sub-national scale
- SAMPLES:
DEMOGRAPHY & POPULATION
• National Demographic and Health Surveys (NDHS)
- inherently connected with various disciplines or development
concerns
• Labor Force Survey (LFS)
POPULATION DATA- mainly obtained thru the following
sources:
1. Census
- a complete enumeration or count of population residing in a
particular area
- conducted by the Philippine Statistics Authority for a particular
appointed time in desired intervals (usually 5 or 10 year intervals)
- latest census was conducted in August 1, 2015
2. VITAL REGISTRATION
- the PSA through the Local Civil Registrars gatherered information
on VITAL EVENTS such as:
• Births • Deaths • Marriages (Including dissolution of marriages)
• Family Income and Expenditure Survey (FIES)
4. ADMINISTRATIVE RECORDS
- information is based on the operations of agencies
• Education data (from DepEd)
• Voters’ List (COMELEC)
• Health indicators (DoH)
OFW profiles (CFO, POEA, OWWA)
POPULATION OUTCOMES:
- Population Size
- Age/Sex Composition
- Geographic/ Spatial Distribution
POPULATION PROCESSES:
- Fertility
- Mortality
- Migration
POPULATION SIZE
- total number of population of a particular geographic or
administrative area
- - include all PERSONS living in private households and
those living in institutional quarters like prisons, dormitories,
hotels, hospitals, and those in embassies, consulates, and
missions abroad
- Land-based Overseas Filipino Workers (OFWs) are included
in the total count as long as they intend to return in a
particular period (usually 5 years)
- Seafarers are included in the population count
How can the population be described?
- By age
- By sex
- Education
- Economic status
- Cultural
- Etc.
POPULATION DISTRIBUTION:
- The pattern of settlement and dispersal of population within
a country or subnational area
SIMPLE STATISTICAL MEASURES
1. PERCENTAGE
2. RATIO
3. PROPORTION
4. RATE
FERTILITY RATE
Crude Birth Rate-the number of births per 1,000 inhabitants. It
is arrived at by means of the following formula:
𝐵
CBR = 𝑃 × 1000
B= Number of Live Births
P= Midyear Total Population in which the births occurred
General Fertility Rate – more refined measure because it gives
the number of live births per 1,000 women in the childbearing
ages. Some demographers use female population ages 15-44
while others use female population ages 15-49 as the base of this
rate.
𝐵
GFR = 𝐹 × 1000
B = Number of Live Births
F = Midyear population of women of ages
15-44 or 15-49
Age-Specific Fertility Rate- It is known that fertility varies with
age. Women in the age group 20-30 years are considered to be
more fertile than those in any other age group. Therefore, if
there are more women in this age-group in the total population,
the general fertility rate of that population will be high. Hence,
birth rates by age, either by single years of by 5-year age groups,
are preferred by most planners and demographers.
𝐵𝑖
ASFRi =
× 1000
𝑃𝑖
ASFR = age specific fertility rate for a population of age group
i.
Bi
= Number of live births to population in age group I
Fi
= Midyear population of age group I
MORATALITY RATE
Crude Death Rate- is the simplest way of measuring mortality in a
population. It is the average number of deaths occurring during the
year per 1,000 persons in the total population.
CDR =
D
= Deaths in the year
P
= Midyear Population
𝐵
× 1000
𝑃
Age-Specific Death Rate –refers to a particular age group in the population.
GFR =
𝐵
× 1000
𝐹
MIGRATION
Net Migration – Difference between in-migration and Outmigration in a country in a particular year
= In-migration - Out-migration
𝐼−𝑂
NMR =
× 1000
𝑃